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* chore: rename benchmark * perf: back parser scope names storage by set * chore: add benchmark
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packages/babel-parser/benchmark/many-let-declarations/1-length-binding.mjs
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,34 @@ | ||
import Benchmark from "benchmark"; | ||
import baseline from "@babel-baseline/parser"; | ||
import current from "../../lib/index.js"; | ||
import { report } from "../util.mjs"; | ||
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||
const suite = new Benchmark.Suite(); | ||
// All codepoints in [0x4e00, 0x9ffc] are valid identifier name per Unicode 13 | ||
function createInput(length) { | ||
if (length > 0x9ffc - 0x4e00) { | ||
throw new Error( | ||
`Length greater than ${ | ||
0x9ffc - 0x4e00 | ||
} is not supported! Consider modify the \`createInput\`.` | ||
); | ||
} | ||
let source = ""; | ||
for (let i = 0; i < length; i++) { | ||
source += "let " + String.fromCharCode(0x4e00 + i) + ";"; | ||
} | ||
return source; | ||
} | ||
function benchCases(name, implementation, options) { | ||
for (const length of [256, 512, 1024, 2048]) { | ||
const input = createInput(length); | ||
suite.add(`${name} ${length} length-1 let bindings`, () => { | ||
implementation.parse(input, options); | ||
}); | ||
} | ||
} | ||
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benchCases("baseline", baseline); | ||
benchCases("current", current); | ||
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suite.on("cycle", report).run(); |
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