Modified version of https://github.com/msgpack/msgpack-javascript/blob/v1.6.0/benchmark/decode-string.ts

decode-benchmark.ts

// NOTE: use the last segment of the result CSV

/* eslint-disable no-console */
import { utf8EncodeJs, utf8Count, utf8DecodeJs, utf8DecodeTD } from "../src/utils/utf8";
import { utf8DecodeWasm } from "../src/wasmFunctions";

// @ts-ignore
import Benchmark from "benchmark";

for (const baseStr of ["A"]) {
  const table = {
    "": [],
  } as Record<string, Array<string | number>>;

  const dataSet = [10, 100, 200, 500, 1_000, 10_000].map((n) => {
    table[""].push(n);

    return baseStr.repeat(n);
  });

  for (const str of dataSet) {
    const byteLength = utf8Count(str);
    const bytes = new Uint8Array(new ArrayBuffer(byteLength));
    utf8EncodeJs(str, bytes, 0);

    console.log(`\n## string "${baseStr}" x ${str.length} (byteLength=${byteLength})\n`);

    const suite = new Benchmark.Suite();

    suite.add("utf8DecodeJs", () => {
      if (utf8DecodeJs(bytes, 0, byteLength) !== str) {
        throw new Error("wrong result!");
      }
    });

    suite.add("utf8DecodeWasm", () => {
      if (utf8DecodeWasm(bytes, 0, byteLength) !== str) {
        throw new Error("wrong result!");
      }
    });
    suite.add("TextDecoder", () => {
      if (utf8DecodeTD(bytes, 0, byteLength) !== str) {
        throw new Error("wrong result!");
      }
    });
    suite.on("cycle", (event: any) => {
      if (!table[event.target.name]) {
        table[event.target.name] = [];
      }
      table[event.target.name].push(Math.log10(event.target.hz));

      console.log(String(event.target));
    });
    suite.on("complete", () => {
      console.log();

      // dump as CSV
      for (const name of Object.keys(table)) {
        const row = [name, ...table[name]].join(",");
        console.log(row);
      }
    });

    suite.run();
  }
}