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https://github.com/danbulant/oxc
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c63f5123b3
Hi! I have created a proof of concept of improving using oxc in JavaScript. The method is not polished but it provides valuable insights for future direction! Feel free to close~ It is for reference only :) # Context This is a proof of concept implementation of passing binary AST to JavaScript. JavaScript can selectively read flexbuffers-based AST nodes on demand to avoid the deserialization toll. More context [here](https://dev.to/herrington_darkholme/benchmark-typescript-parsers-demystify-rust-tooling-performance-2go8). # Changes * Add a `parseSyncBuffer` napi method to return a binary AST from Rust to JavaScript. The AST is in flexbuffer format. * Add a `test_buffer.js` to test usage of flexbuffers in JavaScript. It is in cjs format because flexbuffers does not support ESM :/ # Result Some preliminary results, for reference only. ``` ~ node test_buffer.js testJSON: 4.043s testBuffer: 2.395s ``` Buffer based API is 100% faster than JSON. # Future Ideas * Flexbuffers itself is slow. A better binary protocol is desired! * Using binary reader to traverse AST is undesirable. A proxy-based API to emulate object behavior will be nice.
32 lines
888 B
JavaScript
32 lines
888 B
JavaScript
const oxc = require('./index');
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const assert = require('assert');
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const flexbuffers = require('flatbuffers/js/flexbuffers');
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const file = require('fs').readFileSync(__dirname + '/index.js', 'utf8');
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function testBuffer() {
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const buffer = oxc.parseSyncBuffer(file);
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const ref = flexbuffers.toReference(buffer.buffer);
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assert(ref.isMap());
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assert.equal(ref.get('type').stringValue(), 'Program');
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const body = ref.get('body');
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assert(body.isVector());
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}
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function testJSON() {
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const ret = oxc.parseSync(file);
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const program = JSON.parse(ret.program);
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assert(typeof program === 'object');
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assert.equal(program.type, 'Program');
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assert(Array.isArray(program.body));
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}
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function benchmark(func, time) {
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console.time(func.name);
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for (let i = 0; i < time; i++) {
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func();
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}
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console.timeEnd(func.name)
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}
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benchmark(testJSON, 10000);
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benchmark(testBuffer, 10000);
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