JSTests/microbenchmarks/wasm-into-char-code-array-8bit-short.js

//@ $skipModes << :lockdown
//@ skip if $addressBits <= 32
// Benchmarks the wasm:js-string intoCharCodeArray builtin with a short 8-bit string.
// See wasm-into-char-code-array-8bit.js for the module source.
const moduleBytes = new Uint8Array([0,97,115,109,1,0,0,0,1,146,128,128,128,0,3,94,119,1,96,3,111,99,0,127,1,127,96,1,127,1,100,0,2,164,128,128,128,0,1,14,119,97,115,109,58,106,115,45,115,116,114,105,110,103,17,105,110,116,111,67,104,97,114,67,111,100,101,65,114,114,97,121,0,1,3,131,128,128,128,0,2,2,1,7,147,128,128,128,0,2,9,109,97,107,101,65,114,114,97,121,0,1,3,114,117,110,0,2,10,187,128,128,128,0,2,135,128,128,128,0,0,32,0,251,7,0,11,169,128,128,128,0,1,2,127,2,64,3,64,32,3,32,2,79,13,1,32,4,32,0,32,1,65,0,16,0,106,33,4,32,3,65,1,106,33,3,12,0,11,11,32,4,11]);

const module = new WebAssembly.Module(moduleBytes, { builtins: ['js-string'] });
const instance = new WebAssembly.Instance(module, {});
const { makeArray, run } = instance.exports;

const length = 15;
let string = "";
for (let i = 0; i < length; ++i)
    string += String.fromCharCode(0x20 + (i & 0x5f));
const array = makeArray(length);

const innerIterations = 10000;
let sum = 0;
for (let i = 0; i < 250; ++i)
    sum += run(string, array, innerIterations);

if (sum !== 250 * innerIterations * length)
    throw new Error("Bad result: " + sum);