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stevekrousestevekrouse
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summary html file that runs both benchmarks
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‎zaplib/examples/benchmark_json/generate_json.rb

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# https://github.com/kostya/benchmarks/blob/1dd7deb29a813d1095e6062c25ad92bd81ce0273/json/generate_json.rb
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# frozen_string_literal: true
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require 'json'

‎zaplib/examples/benchmark_json/index.html

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<head>
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<meta charset="utf-8" />
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<style>
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body {
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padding: 50px;
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font-family: Georgia, 'Times New Roman', Times, serif;
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}
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table {
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font-family: arial, sans-serif;
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border-collapse: collapse;
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width: 100%;
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}
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td,
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th {
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border: 1px solid #dddddd;
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text-align: left;
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padding: 8px;
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}
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tr:nth-child(even) {
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background-color: #dddddd;
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}
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</style>
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</head>
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<body style="margin: 0; overflow: hidden">
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<h1><a href="https://zaplib.com">Zaplib</a> (rust/wasm) vs JS: 100mb JSON parsing</h1>
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<p>
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This benchmark was adapted from <a href="https://github.com/kostya/benchmarks#json">kostya/benchmarks</a>, but adapted to work for JS (web) vs Zaplib (rust/wasm).
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</p>
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<p>
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To re-generate the json file locally, run the generate_json.rb file in this directory.
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</p>
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<p>
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It would be interesting augment the Rust benchmark with a simd-powered parsing library, but I wasn't able to get one to compile on my M1 mac... yet!
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</p>
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<p>
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You may notice that the Zaplib benchmark runs about 2x as <em>slow</em> if the devtools are open. We don't exactly know why this is – likely it's a debug or profiling mode that gets enabled.
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</p>
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<table>
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<tr>
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<th>Language</th>
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<th>Parsing Time (ms)</th>
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<th>Compute Time (ms</th>
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</tr>
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<tr>
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<td>JavaScript (JSON.parse)</td>
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<td id="js-parsing"></td>
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<td id="js-compute"></td>
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</tr>
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<tr>
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<td>Zaplib Rust Wasm (w/ Serde)</td>
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<td id="zaplib-serde-parsing"></td>
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<td id="zaplib-serde-compute"></td>
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</tr>
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</table>
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<script src="/zaplib/examples/benchmark_json/js/index.js"></script>
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<script type="text/javascript" src="/zaplib/web/dist/zaplib_runtime.development.js"></script>
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<script>
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async function repeatedBenchmark(name, func) {
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let totals = [0, 0];
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for (let i = 1; i <= 10; i++) {
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const [parsingT, computeT] = await func();
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totals[0] += parsingT;
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totals[1] += computeT;
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document.getElementById(`${name}-parsing`).innerHTML = Math.round(totals[0] / i);
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document.getElementById(`${name}-compute`).innerHTML = Math.round(totals[1] / i);
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await new Promise(requestAnimationFrame);
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}
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}
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(async function() {
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await repeatedBenchmark('js', benchmarkJS);
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zaplib.initialize({ wasmModule: '/target/wasm32-unknown-unknown/release/benchmark_json_zaplib.wasm' }).then(() => {
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repeatedBenchmark('zaplib-serde', async () => (await zaplib.callRustAsync(""))[0]);
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});
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}());
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</script>
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</body>

‎zaplib/examples/benchmark_json/js/index.html

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‎zaplib/examples/benchmark_json/js/index.js

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'use strict';
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function calc(text) {
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const jobj = JSON.parse(text);
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function calc(jobj) {
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const coordinates = jobj['coordinates'];
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const len = coordinates.length;
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let x = 0;
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};
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}
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fetch('../data.json').then(response => response.text()).then(text => {
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const textP = fetch('/zaplib/examples/benchmark_json/data.json').then(response => response.text());
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const benchmarkJS = async function() {
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const text = await textP;
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const startP = performance.now()
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const jobj = JSON.parse(text);
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const endP = performance.now();
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const start = performance.now()
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const results = calc(text);
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const results = calc(jobj);
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const end = performance.now();
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console.log(`Time: ${end - start} ms`);
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});
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return [endP-startP, end - start];
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}

‎zaplib/examples/benchmark_json/zaplib/index.html

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‎zaplib/examples/benchmark_json/zaplib/index.js

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‎zaplib/examples/benchmark_json/zaplib/src/main.rs

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coordinates: Vec<Coordinate>,
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}
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fn calc(s: &str) -> Coordinate {
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let jobj = serde_json::from_str::<TestStruct>(s).unwrap();
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fn calc(jobj: TestStruct) -> Coordinate {
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let len = jobj.coordinates.len() as f64;
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let mut x = 0_f64;
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let mut y = 0_f64;
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Coordinate { x: x / len, y: y / len, z: z / len }
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}
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fn run() {
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fn call_rust(_name: String, _params: Vec<ZapParam>) -> Vec<ZapParam> {
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let mut file = UniversalFile::open("zaplib/examples/benchmark_json/data.json").unwrap();
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let mut s = String::new();
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file.read_to_string(&mut s);
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let ret = file.read_to_string(&mut s);
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if ret.is_err() {
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panic!("Failed to read file");
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}
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let start_p = Instant::now();
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let jobj = serde_json::from_str::<TestStruct>(&s).unwrap();
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let end_p: UniversalInstant = Instant::now();
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let start = Instant::now();
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calc(&s);
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calc(jobj);
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let end: UniversalInstant = Instant::now();
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log!("{:?}", end.duration_since(start));
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}
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fn call_rust(_name: String, _params: Vec<ZapParam>) -> Vec<ZapParam> {
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run();
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vec![]
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vec![
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vec![
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end_p.duration_since(start_p).as_millis() as u32,
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end.duration_since(start).as_millis() as u32
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].into_param()
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]
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}
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register_call_rust!(call_rust);

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