From 7e9e16690e946294424c98ba0777aa6e58bed28c Mon Sep 17 00:00:00 2001
From: Mahdi Dibaiee <mdibaiee@pm.me>
Date: Thu, 16 Jun 2022 16:45:30 +0100
Subject: [PATCH] first version for blog

---
 .gitignore                |   2 +-
 Cargo.lock                |  18 +-
 Cargo.toml                |  18 +-
 dhat-ad-hoc.json          |  39 ----
 dhat-heap.json            | 237 ----------------------
 flamegraph.svg            | 414 --------------------------------------
 heap-program/Cargo.toml   |  10 +
 heap-program/src/main.rs  |  35 ++++
 main-expanded.rs          |  54 -----
 src/main.rs               |  43 ----
 src/test.rs               |   0
 stack-program/Cargo.lock  |   7 +
 stack-program/Cargo.toml  |   4 +
 stack-program/src/main.rs |   9 +
 14 files changed, 79 insertions(+), 811 deletions(-)
 delete mode 100644 dhat-ad-hoc.json
 delete mode 100644 dhat-heap.json
 delete mode 100644 flamegraph.svg
 create mode 100644 heap-program/Cargo.toml
 create mode 100644 heap-program/src/main.rs
 delete mode 100644 main-expanded.rs
 delete mode 100644 src/main.rs
 delete mode 100644 src/test.rs
 create mode 100644 stack-program/Cargo.lock
 create mode 100644 stack-program/Cargo.toml
 create mode 100644 stack-program/src/main.rs

diff --git a/.gitignore b/.gitignore
index ea8c4bf..eb5a316 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1 @@
-/target
+target
diff --git a/Cargo.lock b/Cargo.lock
index 37b9dd0..2d05054 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -77,6 +77,13 @@ version = "0.26.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "78cc372d058dcf6d5ecd98510e7fbc9e5aec4d21de70f65fea8fecebcd881bd4"
 
+[[package]]
+name = "heap-program"
+version = "0.1.0"
+dependencies = [
+ "dhat",
+]
+
 [[package]]
 name = "instant"
 version = "0.1.12"
@@ -251,6 +258,10 @@ version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f2dd574626839106c320a323308629dcb1acfc96e32a8cba364ddc61ac23ee83"
 
+[[package]]
+name = "stack-program"
+version = "0.1.0"
+
 [[package]]
 name = "syn"
 version = "1.0.96"
@@ -295,10 +306,3 @@ name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
-
-[[package]]
-name = "zero-copy-deserialize"
-version = "0.1.0"
-dependencies = [
- "dhat",
-]
diff --git a/Cargo.toml b/Cargo.toml
index 6467266..60fa435 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,16 +1,2 @@
-[package]
-name = "zero-copy-deserialize"
-version = "0.1.0"
-edition = "2021"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
-dhat = "0.3.0"
-
-[profile.release]
-debug = 1
-
-[features]
-dhat-heap = []    # if you are doing heap profiling
-dhat-ad-hoc = []  # if you are doing ad hoc profiling
+[workspace]
+members = ["stack-program", "heap-program"]
diff --git a/dhat-ad-hoc.json b/dhat-ad-hoc.json
deleted file mode 100644
index 6cf6b45..0000000
--- a/dhat-ad-hoc.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-"dhatFileVersion": 2,
-"mode": "rust-ad-hoc",
-"verb": "Allocated",
-"bklt": false,
-"bkacc": false,
-"bu": "unit",
-"bsu": "units",
-"bksu": "events",
-"tu": "µs",
-"Mtu": "s",
-"cmd": "target/debug/zero-copy-deserialize",
-"pid": 42993,
-"te": 250,
-"pps": [
-{
-"tb": 100,
-"tbk": 1,
-"fs": [
-1,
-2
-]
-},
-{
-"tb": 100,
-"tbk": 1,
-"fs": [
-1,
-3
-]
-}
-],
-"ftbl": [
-"[root]",
-"0x100047454: dhat::ad_hoc_event (dhat-0.3.0/src/lib.rs:1322:18)",
-"0x10003dd08: zero_copy_deserialize::main (zero-copy-deserialize/src/main.rs:36:5)",
-"0x10003dde4: zero_copy_deserialize::main (zero-copy-deserialize/src/main.rs:44:5)"
-]
-}
\ No newline at end of file
diff --git a/dhat-heap.json b/dhat-heap.json
deleted file mode 100644
index ffa85cc..0000000
--- a/dhat-heap.json
+++ /dev/null
@@ -1,237 +0,0 @@
-{
-"dhatFileVersion": 2,
-"mode": "rust-heap",
-"verb": "Allocated",
-"bklt": true,
-"bkacc": false,
-"tu": "µs",
-"Mtu": "s",
-"tuth": 10,
-"cmd": "target/debug/zero-copy-deserialize",
-"pid": 43081,
-"tg": 272,
-"te": 291,
-"pps": [
-{
-"tb": 8192,
-"tbk": 1,
-"tl": 112,
-"mb": 8192,
-"mbk": 1,
-"gb": 8192,
-"gbk": 1,
-"eb": 8192,
-"ebk": 1,
-"fs": [
-1,
-2,
-3,
-4,
-5,
-6,
-7,
-8,
-9,
-10,
-11,
-12,
-13,
-14,
-15,
-16,
-17,
-18
-]
-},
-{
-"tb": 8,
-"tbk": 1,
-"tl": 51,
-"mb": 8,
-"mbk": 1,
-"gb": 0,
-"gbk": 0,
-"eb": 0,
-"ebk": 0,
-"fs": [
-19,
-20,
-21,
-22,
-23,
-24,
-25,
-26,
-27,
-28,
-29,
-30,
-31,
-32,
-33,
-34,
-18
-]
-},
-{
-"tb": 64,
-"tbk": 1,
-"tl": 95,
-"mb": 64,
-"mbk": 1,
-"gb": 64,
-"gbk": 1,
-"eb": 64,
-"ebk": 1,
-"fs": [
-35,
-36,
-37,
-38,
-39,
-40,
-41,
-42,
-43,
-11,
-12,
-13,
-14,
-15,
-16,
-17,
-18
-]
-},
-{
-"tb": 4,
-"tbk": 1,
-"tl": 34,
-"mb": 4,
-"mbk": 1,
-"gb": 4,
-"gbk": 1,
-"eb": 0,
-"ebk": 0,
-"fs": [
-44,
-45,
-46,
-47,
-48,
-49,
-50,
-51,
-52,
-53,
-54,
-18
-]
-},
-{
-"tb": 1024,
-"tbk": 1,
-"tl": 19,
-"mb": 1024,
-"mbk": 1,
-"gb": 1024,
-"gbk": 1,
-"eb": 1024,
-"ebk": 1,
-"fs": [
-55,
-56,
-57,
-58,
-59,
-60,
-61,
-62,
-63,
-64,
-65,
-11,
-66,
-67,
-68,
-69,
-70,
-71
-]
-}
-],
-"ftbl": [
-"[root]",
-"0x10488971c: <alloc::alloc::Global as core::alloc::Allocator>::allocate (alloc/src/alloc.rs:231:9)",
-"0x10488971c: alloc::raw_vec::RawVec<T,A>::allocate_in (alloc/src/raw_vec.rs:185:45)",
-"0x10488971c: alloc::raw_vec::RawVec<T,A>::with_capacity_in (alloc/src/raw_vec.rs:132:9)",
-"0x10488971c: alloc::raw_vec::RawVec<T>::with_capacity (alloc/src/raw_vec.rs:93:9)",
-"0x10488971c: alloc::boxed::Box<[T]>::new_uninit_slice (alloc/src/boxed.rs:616:18)",
-"0x10488971c: std::io::buffered::bufreader::BufReader<R>::with_capacity (io/buffered/bufreader.rs:96:19)",
-"0x10488971c: std::io::stdio::stdin::{{closure}} (src/io/stdio.rs:324:24)",
-"0x10488971c: std::lazy::SyncOnceCell<T>::get_or_init::{{closure}} (std/src/lazy.rs:281:50)",
-"0x10488971c: std::lazy::SyncOnceCell<T>::initialize::{{closure}} (std/src/lazy.rs:462:19)",
-"0x10488971c: std::sync::once::Once::call_once_force::{{closure}} (src/sync/once.rs:334:40)",
-"0x1048a67c4: std::sync::once::Once::call_inner (src/sync/once.rs:434:21)",
-"0x1048a691c: std::sync::once::Once::call_once_force (src/sync/once.rs:334:9)",
-"0x1048a691c: std::lazy::SyncOnceCell<T>::initialize (std/src/lazy.rs:461:9)",
-"0x1048865b4: std::lazy::SyncOnceCell<T>::get_or_try_init (std/src/lazy.rs:328:9)",
-"0x1048865b4: std::lazy::SyncOnceCell<T>::get_or_init (std/src/lazy.rs:281:15)",
-"0x1048865b4: std::io::stdio::stdin (src/io/stdio.rs:323:16)",
-"0x104766b58: zero_copy_deserialize::mamad (zero-copy-deserialize/src/main.rs:19:17)",
-"0x104766c20: zero_copy_deserialize::main (zero-copy-deserialize/src/main.rs:32:13)",
-"0x104766d88: __rg_alloc (zero-copy-deserialize/src/main.rs:5:15)",
-"0x1048761d8: alloc::raw_vec::finish_grow (alloc/src/raw_vec.rs:0:0)",
-"0x1048a6210: alloc::raw_vec::RawVec<T,A>::grow_amortized (alloc/src/raw_vec.rs:400:19)",
-"0x1048a6210: alloc::raw_vec::RawVec<T,A>::reserve::do_reserve_and_handle (alloc/src/raw_vec.rs:285:28)",
-"0x104887d40: alloc::raw_vec::RawVec<T,A>::reserve (alloc/src/raw_vec.rs:289:13)",
-"0x104887d40: alloc::vec::Vec<T,A>::reserve (src/vec/mod.rs:813:9)",
-"0x104887d40: alloc::vec::Vec<T,A>::append_elements (src/vec/mod.rs:1798:9)",
-"0x104887d40: <alloc::vec::Vec<T,A> as alloc::vec::spec_extend::SpecExtend<&T,core::slice::iter::Iter<T>>>::spec_extend (src/vec/spec_extend.rs:85:18)",
-"0x104887d40: alloc::vec::Vec<T,A>::extend_from_slice (src/vec/mod.rs:2236:9)",
-"0x104887d40: std::io::read_until (src/io/mod.rs:1892:21)",
-"0x1048866c0: std::io::BufRead::read_line::{{closure}} (src/io/mod.rs:2176:44)",
-"0x1048866c0: std::io::append_to_string (src/io/mod.rs:336:15)",
-"0x1048866c0: std::io::BufRead::read_line (src/io/mod.rs:2176:18)",
-"0x1048866c0: <std::io::stdio::StdinLock as std::io::BufRead>::read_line (src/io/stdio.rs:493:9)",
-"0x104886620: std::io::stdio::Stdin::read_line (src/io/stdio.rs:386:9)",
-"0x104766b94: zero_copy_deserialize::mamad (zero-copy-deserialize/src/main.rs:20:5)",
-"0x10488a528: alloc::alloc::exchange_malloc (alloc/src/alloc.rs:320:11)",
-"0x10488a528: alloc::boxed::Box<T>::new (alloc/src/boxed.rs:195:9)",
-"0x10488a528: <alloc::boxed::Box<T> as core::convert::From<T>>::from (alloc/src/boxed.rs:1386:9)",
-"0x10488a528: std::sys_common::mutex::MovableMutex::new (src/sys_common/mutex.rs:64:25)",
-"0x104889734: std::sync::mutex::Mutex<T>::new (src/sync/mutex.rs:218:20)",
-"0x104889734: std::io::stdio::stdin::{{closure}} (src/io/stdio.rs:324:13)",
-"0x104889734: std::lazy::SyncOnceCell<T>::get_or_init::{{closure}} (std/src/lazy.rs:281:50)",
-"0x104889734: std::lazy::SyncOnceCell<T>::initialize::{{closure}} (std/src/lazy.rs:462:19)",
-"0x104889734: std::sync::once::Once::call_once_force::{{closure}} (src/sync/once.rs:334:40)",
-"0x10489bd58: <alloc::alloc::Global as core::alloc::Allocator>::allocate (alloc/src/alloc.rs:231:9)",
-"0x10489bd58: alloc::raw_vec::RawVec<T,A>::allocate_in (alloc/src/raw_vec.rs:185:45)",
-"0x10489bd58: alloc::raw_vec::RawVec<T,A>::with_capacity_in (alloc/src/raw_vec.rs:132:9)",
-"0x10489bd58: alloc::vec::Vec<T,A>::with_capacity_in (src/vec/mod.rs:613:20)",
-"0x10489bd58: <T as alloc::slice::hack::ConvertVec>::to_vec (alloc/src/slice.rs:227:25)",
-"0x10489bd58: alloc::slice::hack::to_vec (alloc/src/slice.rs:176:9)",
-"0x10489bd58: alloc::slice::<impl [T]>::to_vec_in (alloc/src/slice.rs:507:9)",
-"0x10489bd58: <alloc::vec::Vec<T,A> as core::clone::Clone>::clone (src/vec/mod.rs:2485:9)",
-"0x10489bd58: <alloc::string::String as core::clone::Clone>::clone (alloc/src/string.rs:1861:23)",
-"0x104766ad4: zero_copy_deserialize::parse (zero-copy-deserialize/src/main.rs:13:15)",
-"0x104766bcc: zero_copy_deserialize::mamad (zero-copy-deserialize/src/main.rs:24:5)",
-"0x1048897e8: <alloc::alloc::Global as core::alloc::Allocator>::allocate (alloc/src/alloc.rs:231:9)",
-"0x1048897e8: alloc::raw_vec::RawVec<T,A>::allocate_in (alloc/src/raw_vec.rs:185:45)",
-"0x1048897e8: alloc::raw_vec::RawVec<T,A>::with_capacity_in (alloc/src/raw_vec.rs:132:9)",
-"0x1048897e8: alloc::vec::Vec<T,A>::with_capacity_in (src/vec/mod.rs:613:20)",
-"0x1048897e8: alloc::vec::Vec<T>::with_capacity (src/vec/mod.rs:470:9)",
-"0x1048897e8: std::io::buffered::bufwriter::BufWriter<W>::with_capacity (io/buffered/bufwriter.rs:115:33)",
-"0x1048897e8: std::io::buffered::linewriter::LineWriter<W>::with_capacity (io/buffered/linewriter.rs:109:29)",
-"0x1048897e8: std::io::buffered::linewriter::LineWriter<W>::new (io/buffered/linewriter.rs:89:9)",
-"0x1048897e8: std::io::stdio::stdout::{{closure}} (src/io/stdio.rs:609:58)",
-"0x1048897e8: std::lazy::SyncOnceCell<T>::get_or_init_pin::{{closure}} (std/src/lazy.rs:375:25)",
-"0x1048897e8: std::sync::once::Once::call_once_force::{{closure}} (src/sync/once.rs:334:40)",
-"0x104886e20: std::sync::once::Once::call_once_force (src/sync/once.rs:334:9)",
-"0x104886e20: std::lazy::SyncOnceCell<T>::get_or_init_pin (std/src/lazy.rs:374:9)",
-"0x104886e20: std::io::stdio::stdout (src/io/stdio.rs:608:16)",
-"0x104886e20: std::io::stdio::print_to (src/io/stdio.rs:1016:21)",
-"0x104886e20: std::io::stdio::_print (src/io/stdio.rs:1029:5)",
-"0x104766cc0: zero_copy_deserialize::main (zero-copy-deserialize/src/main.rs:34:5)"
-]
-}
\ No newline at end of file
diff --git a/flamegraph.svg b/flamegraph.svg
deleted file mode 100644
index bd2a9c0..0000000
--- a/flamegraph.svg
+++ /dev/null
@@ -1,414 +0,0 @@
-<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg version="1.1" width="1200" height="310" onload="init(evt)" viewBox="0 0 1200 310" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:fg="http://github.com/jonhoo/inferno"><!--Flame graph stack visualization. See https://github.com/brendangregg/FlameGraph for latest version, and http://www.brendangregg.com/flamegraphs.html for examples.--><!--NOTES: --><defs><linearGradient id="background" y1="0" y2="1" x1="0" x2="0"><stop stop-color="#eeeeee" offset="5%"/><stop stop-color="#eeeeb0" offset="95%"/></linearGradient></defs><style type="text/css">
-text { font-family:"Verdana"; font-size:12px; fill:rgb(0,0,0); }
-#title { text-anchor:middle; font-size:17px; }
-#search { opacity:0.1; cursor:pointer; }
-#search:hover, #search.show { opacity:1; }
-#subtitle { text-anchor:middle; font-color:rgb(160,160,160); }
-#unzoom { cursor:pointer; }
-#frames > *:hover { stroke:black; stroke-width:0.5; cursor:pointer; }
-.hide { display:none; }
-.parent { opacity:0.5; }
-</style><script type="text/ecmascript"><![CDATA[
-        var nametype = 'Function:';
-        var fontsize = 12;
-        var fontwidth = 0.59;
-        var xpad = 10;
-        var inverted = false;
-        var searchcolor = 'rgb(230,0,230)';
-        var fluiddrawing = true;
-        var truncate_text_right = false;
-    ]]><![CDATA["use strict";
-var details, searchbtn, unzoombtn, matchedtxt, svg, searching, frames;
-function init(evt) {
-    details = document.getElementById("details").firstChild;
-    searchbtn = document.getElementById("search");
-    unzoombtn = document.getElementById("unzoom");
-    matchedtxt = document.getElementById("matched");
-    svg = document.getElementsByTagName("svg")[0];
-    frames = document.getElementById("frames");
-    total_samples = parseInt(frames.attributes.total_samples.value);
-    searching = 0;
-
-    // Use GET parameters to restore a flamegraph's state.
-    var restore_state = function() {
-        var params = get_params();
-        if (params.x && params.y)
-            zoom(find_group(document.querySelector('[*|x="' + params.x + '"][y="' + params.y + '"]')));
-        if (params.s)
-            search(params.s);
-    };
-
-    if (fluiddrawing) {
-        // Make width dynamic so the SVG fits its parent's width.
-        svg.removeAttribute("width");
-        // Edge requires us to have a viewBox that gets updated with size changes.
-        var isEdge = /Edge\/\d./i.test(navigator.userAgent);
-        var update_for_width_change = function() {
-            if (isEdge) {
-                svg.attributes.viewBox.value = "0 0 " + svg.width.baseVal.value + " " + svg.height.baseVal.value;
-            }
-
-            // Keep consistent padding on left and right of frames container.
-            frames.attributes.width.value = svg.width.baseVal.value - xpad * 2;
-
-            // Text truncation needs to be adjusted for the current width.
-            var el = frames.children;
-            for(var i = 0; i < el.length; i++) {
-                update_text(el[i]);
-            }
-
-            // Keep search elements at a fixed distance from right edge.
-            var svgWidth = svg.width.baseVal.value;
-            searchbtn.attributes.x.value = svgWidth - xpad - 100;
-            matchedtxt.attributes.x.value = svgWidth - xpad - 100;
-        };
-        window.addEventListener('resize', function() {
-            update_for_width_change();
-        });
-        // This needs to be done asynchronously for Safari to work.
-        setTimeout(function() {
-            unzoom();
-            update_for_width_change();
-            restore_state();
-            if (!isEdge) {
-                svg.removeAttribute("viewBox");
-            }
-        }, 0);
-    } else {
-        restore_state();
-    }
-}
-// event listeners
-window.addEventListener("click", function(e) {
-    var target = find_group(e.target);
-    if (target) {
-        if (target.nodeName == "a") {
-            if (e.ctrlKey === false) return;
-            e.preventDefault();
-        }
-        if (target.classList.contains("parent")) unzoom();
-        zoom(target);
-
-        // set parameters for zoom state
-        var el = target.querySelector("rect");
-        if (el && el.attributes && el.attributes.y && el.attributes["fg:x"]) {
-            var params = get_params()
-            params.x = el.attributes["fg:x"].value;
-            params.y = el.attributes.y.value;
-            history.replaceState(null, null, parse_params(params));
-        }
-    }
-    else if (e.target.id == "unzoom") {
-        unzoom();
-
-        // remove zoom state
-        var params = get_params();
-        if (params.x) delete params.x;
-        if (params.y) delete params.y;
-        history.replaceState(null, null, parse_params(params));
-    }
-    else if (e.target.id == "search") search_prompt();
-}, false)
-// mouse-over for info
-// show
-window.addEventListener("mouseover", function(e) {
-    var target = find_group(e.target);
-    if (target) details.nodeValue = nametype + " " + g_to_text(target);
-}, false)
-// clear
-window.addEventListener("mouseout", function(e) {
-    var target = find_group(e.target);
-    if (target) details.nodeValue = ' ';
-}, false)
-// ctrl-F for search
-window.addEventListener("keydown",function (e) {
-    if (e.keyCode === 114 || (e.ctrlKey && e.keyCode === 70)) {
-        e.preventDefault();
-        search_prompt();
-    }
-}, false)
-// functions
-function get_params() {
-    var params = {};
-    var paramsarr = window.location.search.substr(1).split('&');
-    for (var i = 0; i < paramsarr.length; ++i) {
-        var tmp = paramsarr[i].split("=");
-        if (!tmp[0] || !tmp[1]) continue;
-        params[tmp[0]]  = decodeURIComponent(tmp[1]);
-    }
-    return params;
-}
-function parse_params(params) {
-    var uri = "?";
-    for (var key in params) {
-        uri += key + '=' + encodeURIComponent(params[key]) + '&';
-    }
-    if (uri.slice(-1) == "&")
-        uri = uri.substring(0, uri.length - 1);
-    if (uri == '?')
-        uri = window.location.href.split('?')[0];
-    return uri;
-}
-function find_child(node, selector) {
-    var children = node.querySelectorAll(selector);
-    if (children.length) return children[0];
-    return;
-}
-function find_group(node) {
-    var parent = node.parentElement;
-    if (!parent) return;
-    if (parent.id == "frames") return node;
-    return find_group(parent);
-}
-function orig_save(e, attr, val) {
-    if (e.attributes["fg:orig_" + attr] != undefined) return;
-    if (e.attributes[attr] == undefined) return;
-    if (val == undefined) val = e.attributes[attr].value;
-    e.setAttribute("fg:orig_" + attr, val);
-}
-function orig_load(e, attr) {
-    if (e.attributes["fg:orig_"+attr] == undefined) return;
-    e.attributes[attr].value = e.attributes["fg:orig_" + attr].value;
-    e.removeAttribute("fg:orig_" + attr);
-}
-function g_to_text(e) {
-    var text = find_child(e, "title").firstChild.nodeValue;
-    return (text)
-}
-function g_to_func(e) {
-    var func = g_to_text(e);
-    // if there's any manipulation we want to do to the function
-    // name before it's searched, do it here before returning.
-    return (func);
-}
-function update_text(e) {
-    var r = find_child(e, "rect");
-    var t = find_child(e, "text");
-    var w = parseFloat(r.attributes.width.value) * frames.attributes.width.value / 100 - 3;
-    var txt = find_child(e, "title").textContent.replace(/\([^(]*\)$/,"");
-    t.attributes.x.value = format_percent((parseFloat(r.attributes.x.value) + (100 * 3 / frames.attributes.width.value)));
-    // Smaller than this size won't fit anything
-    if (w < 2 * fontsize * fontwidth) {
-        t.textContent = "";
-        return;
-    }
-    t.textContent = txt;
-    // Fit in full text width
-    if (/^ *\$/.test(txt) || t.getComputedTextLength() < w)
-        return;
-    if (truncate_text_right) {
-        // Truncate the right side of the text.
-        for (var x = txt.length - 2; x > 0; x--) {
-            if (t.getSubStringLength(0, x + 2) <= w) {
-                t.textContent = txt.substring(0, x) + "..";
-                return;
-            }
-        }
-    } else {
-        // Truncate the left side of the text.
-        for (var x = 2; x < txt.length; x++) {
-            if (t.getSubStringLength(x - 2, txt.length) <= w) {
-                t.textContent = ".." + txt.substring(x, txt.length);
-                return;
-            }
-        }
-    }
-    t.textContent = "";
-}
-// zoom
-function zoom_reset(e) {
-    if (e.tagName == "rect") {
-        e.attributes.x.value = format_percent(100 * parseInt(e.attributes["fg:x"].value) / total_samples);
-        e.attributes.width.value = format_percent(100 * parseInt(e.attributes["fg:w"].value) / total_samples);
-    }
-    if (e.childNodes == undefined) return;
-    for(var i = 0, c = e.childNodes; i < c.length; i++) {
-        zoom_reset(c[i]);
-    }
-}
-function zoom_child(e, x, zoomed_width_samples) {
-    if (e.tagName == "text") {
-        var parent_x = parseFloat(find_child(e.parentNode, "rect[x]").attributes.x.value);
-        e.attributes.x.value = format_percent(parent_x + (100 * 3 / frames.attributes.width.value));
-    } else if (e.tagName == "rect") {
-        e.attributes.x.value = format_percent(100 * (parseInt(e.attributes["fg:x"].value) - x) / zoomed_width_samples);
-        e.attributes.width.value = format_percent(100 * parseInt(e.attributes["fg:w"].value) / zoomed_width_samples);
-    }
-    if (e.childNodes == undefined) return;
-    for(var i = 0, c = e.childNodes; i < c.length; i++) {
-        zoom_child(c[i], x, zoomed_width_samples);
-    }
-}
-function zoom_parent(e) {
-    if (e.attributes) {
-        if (e.attributes.x != undefined) {
-            e.attributes.x.value = "0.0%";
-        }
-        if (e.attributes.width != undefined) {
-            e.attributes.width.value = "100.0%";
-        }
-    }
-    if (e.childNodes == undefined) return;
-    for(var i = 0, c = e.childNodes; i < c.length; i++) {
-        zoom_parent(c[i]);
-    }
-}
-function zoom(node) {
-    var attr = find_child(node, "rect").attributes;
-    var width = parseInt(attr["fg:w"].value);
-    var xmin = parseInt(attr["fg:x"].value);
-    var xmax = xmin + width;
-    var ymin = parseFloat(attr.y.value);
-    unzoombtn.classList.remove("hide");
-    var el = frames.children;
-    for (var i = 0; i < el.length; i++) {
-        var e = el[i];
-        var a = find_child(e, "rect").attributes;
-        var ex = parseInt(a["fg:x"].value);
-        var ew = parseInt(a["fg:w"].value);
-        // Is it an ancestor
-        if (!inverted) {
-            var upstack = parseFloat(a.y.value) > ymin;
-        } else {
-            var upstack = parseFloat(a.y.value) < ymin;
-        }
-        if (upstack) {
-            // Direct ancestor
-            if (ex <= xmin && (ex+ew) >= xmax) {
-                e.classList.add("parent");
-                zoom_parent(e);
-                update_text(e);
-            }
-            // not in current path
-            else
-                e.classList.add("hide");
-        }
-        // Children maybe
-        else {
-            // no common path
-            if (ex < xmin || ex >= xmax) {
-                e.classList.add("hide");
-            }
-            else {
-                zoom_child(e, xmin, width);
-                update_text(e);
-            }
-        }
-    }
-}
-function unzoom() {
-    unzoombtn.classList.add("hide");
-    var el = frames.children;
-    for(var i = 0; i < el.length; i++) {
-        el[i].classList.remove("parent");
-        el[i].classList.remove("hide");
-        zoom_reset(el[i]);
-        update_text(el[i]);
-    }
-}
-// search
-function reset_search() {
-    var el = document.querySelectorAll("#frames rect");
-    for (var i = 0; i < el.length; i++) {
-        orig_load(el[i], "fill")
-    }
-    var params = get_params();
-    delete params.s;
-    history.replaceState(null, null, parse_params(params));
-}
-function search_prompt() {
-    if (!searching) {
-        var term = prompt("Enter a search term (regexp " +
-            "allowed, eg: ^ext4_)", "");
-        if (term != null) {
-            search(term)
-        }
-    } else {
-        reset_search();
-        searching = 0;
-        searchbtn.classList.remove("show");
-        searchbtn.firstChild.nodeValue = "Search"
-        matchedtxt.classList.add("hide");
-        matchedtxt.firstChild.nodeValue = ""
-    }
-}
-function search(term) {
-    var re = new RegExp(term);
-    var el = frames.children;
-    var matches = new Object();
-    var maxwidth = 0;
-    for (var i = 0; i < el.length; i++) {
-        var e = el[i];
-        // Skip over frames which are either not visible, or below the zoomed-to frame
-        if (e.classList.contains("hide") || e.classList.contains("parent")) {
-            continue;
-        }
-        var func = g_to_func(e);
-        var rect = find_child(e, "rect");
-        if (func == null || rect == null)
-            continue;
-        // Save max width. Only works as we have a root frame
-        var w = parseInt(rect.attributes["fg:w"].value);
-        if (w > maxwidth)
-            maxwidth = w;
-        if (func.match(re)) {
-            // highlight
-            var x = parseInt(rect.attributes["fg:x"].value);
-            orig_save(rect, "fill");
-            rect.attributes.fill.value = searchcolor;
-            // remember matches
-            if (matches[x] == undefined) {
-                matches[x] = w;
-            } else {
-                if (w > matches[x]) {
-                    // overwrite with parent
-                    matches[x] = w;
-                }
-            }
-            searching = 1;
-        }
-    }
-    if (!searching)
-        return;
-    var params = get_params();
-    params.s = term;
-    history.replaceState(null, null, parse_params(params));
-
-    searchbtn.classList.add("show");
-    searchbtn.firstChild.nodeValue = "Reset Search";
-    // calculate percent matched, excluding vertical overlap
-    var count = 0;
-    var lastx = -1;
-    var lastw = 0;
-    var keys = Array();
-    for (k in matches) {
-        if (matches.hasOwnProperty(k))
-            keys.push(k);
-    }
-    // sort the matched frames by their x location
-    // ascending, then width descending
-    keys.sort(function(a, b){
-        return a - b;
-    });
-    // Step through frames saving only the biggest bottom-up frames
-    // thanks to the sort order. This relies on the tree property
-    // where children are always smaller than their parents.
-    for (var k in keys) {
-        var x = parseInt(keys[k]);
-        var w = matches[keys[k]];
-        if (x >= lastx + lastw) {
-            count += w;
-            lastx = x;
-            lastw = w;
-        }
-    }
-    // display matched percent
-    matchedtxt.classList.remove("hide");
-    var pct = 100 * count / maxwidth;
-    if (pct != 100) pct = pct.toFixed(1);
-    matchedtxt.firstChild.nodeValue = "Matched: " + pct + "%";
-}
-function format_percent(n) {
-    return n.toFixed(4) + "%";
-}
-]]></script><rect x="0" y="0" width="100%" height="310" fill="url(#background)"/><text id="title" x="50.0000%" y="24.00">Flame Graph</text><text id="details" x="10" y="293.00"> </text><text id="unzoom" class="hide" x="10" y="24.00">Reset Zoom</text><text id="search" x="1090" y="24.00">Search</text><text id="matched" x="1090" y="293.00"> </text><svg id="frames" x="10" width="1180" total_samples="2"><g><title>dyld`start (1 samples, 50.00%)</title><rect x="0.0000%" y="245" width="50.0000%" height="15" fill="rgb(227,0,7)" fg:x="0" fg:w="1"/><text x="0.2500%" y="255.50">dyld`start</text></g><g><title>zero-copy-deserialize`main (1 samples, 50.00%)</title><rect x="0.0000%" y="229" width="50.0000%" height="15" fill="rgb(217,0,24)" fg:x="0" fg:w="1"/><text x="0.2500%" y="239.50">zero-copy-deserialize`main</text></g><g><title>zero-copy-deserialize`std::rt::lang_start_internal (1 samples, 50.00%)</title><rect x="0.0000%" y="213" width="50.0000%" height="15" fill="rgb(221,193,54)" fg:x="0" fg:w="1"/><text x="0.2500%" y="223.50">zero-copy-deserialize`std::rt::lang_start_internal</text></g><g><title>zero-copy-deserialize`std::rt::lang_start::_{{closure}} (1 samples, 50.00%)</title><rect x="0.0000%" y="197" width="50.0000%" height="15" fill="rgb(248,212,6)" fg:x="0" fg:w="1"/><text x="0.2500%" y="207.50">zero-copy-deserialize`std::rt::lang_start::_{{closure}}</text></g><g><title>zero-copy-deserialize`std::sys_common::backtrace::__rust_begin_short_backtrace (1 samples, 50.00%)</title><rect x="0.0000%" y="181" width="50.0000%" height="15" fill="rgb(208,68,35)" fg:x="0" fg:w="1"/><text x="0.2500%" y="191.50">zero-copy-deserialize`std::sys_common::backtrace::__rust_begin_short_backtrace</text></g><g><title>zero-copy-deserialize`zero_copy_deserialize::main (1 samples, 50.00%)</title><rect x="0.0000%" y="165" width="50.0000%" height="15" fill="rgb(232,128,0)" fg:x="0" fg:w="1"/><text x="0.2500%" y="175.50">zero-copy-deserialize`zero_copy_deserialize::main</text></g><g><title>zero-copy-deserialize`std::io::stdio::_print (1 samples, 50.00%)</title><rect x="0.0000%" y="149" width="50.0000%" height="15" fill="rgb(207,160,47)" fg:x="0" fg:w="1"/><text x="0.2500%" y="159.50">zero-copy-deserialize`std::io::stdio::_print</text></g><g><title>zero-copy-deserialize`std::sync::once::Once::call_inner (1 samples, 50.00%)</title><rect x="0.0000%" y="133" width="50.0000%" height="15" fill="rgb(228,23,34)" fg:x="0" fg:w="1"/><text x="0.2500%" y="143.50">zero-copy-deserialize`std::sync::once::Once::call_inner</text></g><g><title>zero-copy-deserialize`std::sync::once::Once::call_once_force::_{{closure}} (1 samples, 50.00%)</title><rect x="0.0000%" y="117" width="50.0000%" height="15" fill="rgb(218,30,26)" fg:x="0" fg:w="1"/><text x="0.2500%" y="127.50">zero-copy-deserialize`std::sync::once::Once::call_once_force::_{{closure}}</text></g><g><title>libsystem_malloc.dylib`_malloc_zone_malloc (1 samples, 50.00%)</title><rect x="0.0000%" y="101" width="50.0000%" height="15" fill="rgb(220,122,19)" fg:x="0" fg:w="1"/><text x="0.2500%" y="111.50">libsystem_malloc.dylib`_malloc_zone_malloc</text></g><g><title>libsystem_malloc.dylib`szone_malloc_should_clear (1 samples, 50.00%)</title><rect x="0.0000%" y="85" width="50.0000%" height="15" fill="rgb(250,228,42)" fg:x="0" fg:w="1"/><text x="0.2500%" y="95.50">libsystem_malloc.dylib`szone_malloc_should_clear</text></g><g><title>libsystem_malloc.dylib`small_malloc_should_clear (1 samples, 50.00%)</title><rect x="0.0000%" y="69" width="50.0000%" height="15" fill="rgb(240,193,28)" fg:x="0" fg:w="1"/><text x="0.2500%" y="79.50">libsystem_malloc.dylib`small_malloc_should_clear</text></g><g><title>libsystem_malloc.dylib`mvm_allocate_pages (1 samples, 50.00%)</title><rect x="0.0000%" y="53" width="50.0000%" height="15" fill="rgb(216,20,37)" fg:x="0" fg:w="1"/><text x="0.2500%" y="63.50">libsystem_malloc.dylib`mvm_allocate_pages</text></g><g><title>libsystem_kernel.dylib`_kernelrpc_mach_vm_map_trap (1 samples, 50.00%)</title><rect x="0.0000%" y="37" width="50.0000%" height="15" fill="rgb(206,188,39)" fg:x="0" fg:w="1"/><text x="0.2500%" y="47.50">libsystem_kernel.dylib`_kernelrpc_mach_vm_map_trap</text></g><g><title>all (2 samples, 100%)</title><rect x="0.0000%" y="261" width="100.0000%" height="15" fill="rgb(217,207,13)" fg:x="0" fg:w="2"/><text x="0.2500%" y="271.50"></text></g><g><title>libsystem_kernel.dylib`__exit (1 samples, 50.00%)</title><rect x="50.0000%" y="245" width="50.0000%" height="15" fill="rgb(231,73,38)" fg:x="1" fg:w="1"/><text x="50.2500%" y="255.50">libsystem_kernel.dylib`__exit</text></g></svg></svg>
\ No newline at end of file
diff --git a/heap-program/Cargo.toml b/heap-program/Cargo.toml
new file mode 100644
index 0000000..53d8fe1
--- /dev/null
+++ b/heap-program/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "heap-program"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+dhat = "0.3.0"
+
+[features]
+dhat-heap = []    # if you are doing heap profiling
diff --git a/heap-program/src/main.rs b/heap-program/src/main.rs
new file mode 100644
index 0000000..ee8eae7
--- /dev/null
+++ b/heap-program/src/main.rs
@@ -0,0 +1,35 @@
+use std::io::{self, Read};
+
+fn stdin_boxed_str() -> Box<str> {
+    let mut buff = [0; 10];
+    let mut stdin = io::stdin(); // We get `Stdin` here.
+    stdin.read(&mut buff).unwrap();
+    let s = std::str::from_utf8(&buff).unwrap();
+
+    s.into()
+}
+
+fn stdin_string() -> String {
+    let mut buff = String::new();
+    std::io::stdin().read_line(&mut buff).unwrap();
+
+    buff
+}
+
+fn my_simple_program(a: i32) -> i32 {
+    let b = 10;
+    a + b
+}
+
+
+fn main() {
+    println!("{}", my_simple_program(5));
+
+    let boxed_str = stdin_boxed_str();
+
+    println!("boxed_str: {}", boxed_str);
+
+    let stdin_str = stdin_string();
+
+    println!("stdin_str: {}", stdin_str);
+}
diff --git a/main-expanded.rs b/main-expanded.rs
deleted file mode 100644
index 9d73013..0000000
--- a/main-expanded.rs
+++ /dev/null
@@ -1,54 +0,0 @@
-#![feature(prelude_import)]
-#[prelude_import]
-use std::prelude::rust_2021::*;
-#[macro_use]
-extern crate std;
-use std::io;
-struct T {
-    name: String,
-}
-#[automatically_derived]
-#[allow(unused_qualifications)]
-impl ::core::fmt::Debug for T {
-    fn fmt(&self, f: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
-        match *self {
-            T {
-                name: ref __self_0_0,
-            } => {
-                let debug_trait_builder = &mut ::core::fmt::Formatter::debug_struct(f, "T");
-                let _ =
-                    ::core::fmt::DebugStruct::field(debug_trait_builder, "name", &&(*__self_0_0));
-                ::core::fmt::DebugStruct::finish(debug_trait_builder)
-            }
-        }
-    }
-}
-fn parse(s: &String) -> T {
-    T { name: s.clone() }
-}
-fn mamad(s: String) -> T {
-    parse(&s)
-}
-fn main() {
-    let mut buffer = String::new();
-    let stdin = io::stdin();
-    stdin.read_line(&mut buffer).unwrap();
-    let t = mamad(buffer);
-    {
-        ::std::io::_print(::core::fmt::Arguments::new_v1_formatted(
-            &["", "\n"],
-            &[::core::fmt::ArgumentV1::new_debug(&t)],
-            &[::core::fmt::rt::v1::Argument {
-                position: 0usize,
-                format: ::core::fmt::rt::v1::FormatSpec {
-                    fill: ' ',
-                    align: ::core::fmt::rt::v1::Alignment::Unknown,
-                    flags: 4u32,
-                    precision: ::core::fmt::rt::v1::Count::Implied,
-                    width: ::core::fmt::rt::v1::Count::Implied,
-                },
-            }],
-            unsafe { ::core::fmt::UnsafeArg::new() },
-        ));
-    };
-}
diff --git a/src/main.rs b/src/main.rs
deleted file mode 100644
index bd4ada5..0000000
--- a/src/main.rs
+++ /dev/null
@@ -1,43 +0,0 @@
-use std::io;
-
-#[cfg(feature = "dhat-heap")]
-#[global_allocator]
-static ALLOC: dhat::Alloc = dhat::Alloc;
-
-struct T {
-    name: String
-}
-
-fn parse(s: String) -> T {
-    T {
-        name: s.clone()
-    }
-}
-
-fn mamad() -> T {
-    let mut buff = String::new();
-    let stdin = io::stdin(); // We get `Stdin` here.
-    stdin.read_line(&mut buff).unwrap();
-
-    //let name = Box::new(s);
-    //parse(&name)
-    parse(buff)
-}
-
-
-fn main() {
-    #[cfg(feature = "dhat-heap")]
-    let _profiler = dhat::Profiler::new_heap();
-
-    let t = mamad();
-
-    println!("name: {}", t.name);
-
-    std::thread::sleep(std::time::Duration::from_secs(10));
-
-    drop(t);
-
-    println!("done");
-
-    std::thread::sleep(std::time::Duration::from_secs(10));
-}
diff --git a/src/test.rs b/src/test.rs
deleted file mode 100644
index e69de29..0000000
diff --git a/stack-program/Cargo.lock b/stack-program/Cargo.lock
new file mode 100644
index 0000000..ea20ae4
--- /dev/null
+++ b/stack-program/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "stack-program"
+version = "0.1.0"
diff --git a/stack-program/Cargo.toml b/stack-program/Cargo.toml
new file mode 100644
index 0000000..1620382
--- /dev/null
+++ b/stack-program/Cargo.toml
@@ -0,0 +1,4 @@
+[package]
+name = "stack-program"
+version = "0.1.0"
+edition = "2021"
diff --git a/stack-program/src/main.rs b/stack-program/src/main.rs
new file mode 100644
index 0000000..51145e1
--- /dev/null
+++ b/stack-program/src/main.rs
@@ -0,0 +1,9 @@
+fn add_ten(a: u8) -> u8 {
+    let b = 10;
+    a + b
+}
+
+
+fn main() {
+    println!("{}", add_ten(9));
+}