regex-redux TypeScript #3 program

/* The Computer Language Benchmarks Game
   https://salsa.debian.org/benchmarksgame-team/benchmarksgame/

   regex-dna program contributed by Jesse Millikan
   based on the Ruby version by jose fco. gonzalez
   fixed by Matthew Wilson
   ported to Node.js and sped up by Roman Pletnev
   converted from regex-dna program
   fixed by Josh Goldfoot
   multi thread by Andrey Filatkin
   converted by Isaac Gouy
*/

import { Worker, isMainThread, parentPort, workerData } from 'worker_threads';
const fs = require('fs');

if (isMainThread) {
    mainThread();
} else {
    workerThread(workerData);
}

async function mainThread() {
    const regExps = [
        /agggtaaa|tttaccct/ig,
        /[cgt]gggtaaa|tttaccc[acg]/ig,
        /a[act]ggtaaa|tttacc[agt]t/ig,
        /ag[act]gtaaa|tttac[agt]ct/ig,
        /agg[act]taaa|ttta[agt]cct/ig,
        /aggg[acg]aaa|ttt[cgt]ccct/ig,
        /agggt[cgt]aa|tt[acg]accct/ig,
        /agggta[cgt]a|t[acg]taccct/ig,
        /agggtaa[cgt]|[acg]ttaccct/ig
    ];

    let data = fs.readFileSync('/dev/stdin', 'ascii');
    const initialLen = data.length;

    data = data.replace(/^>.*\n|\n/mg, '');
    const cleanedLen = data.length;

    const worker = replaceWork(data);

    for (let j = 0; j < regExps.length; j++) {
        const re = regExps[j];
        const m = data.match(re);
        console.log(re.source, m ? m.length : 0);
    }

    const endLen = await worker;

    console.log(`\n${initialLen}\n${cleanedLen}\n${endLen}`);

    function replaceWork(data: string) {
        return new Promise(resolve => {
            const worker = new Worker(__filename, {workerData: data});
            worker.on('message', message => {
                resolve(message.data);
            });
        });
    }
}

function workerThread(data: string) {
    const len = data
        .replace(/tHa[Nt]/g, '<4>')
        .replace(/aND|caN|Ha[DS]|WaS/g, '<3>')
        .replace(/a[NSt]|BY/g, '<2>')
        .replace(/<[^>]*>/g, '|')
        .replace(/\|[^|][^|]*\|/g, '-')
        .length;
    parentPort?.postMessage({data: len});
}
    

NOTES:
64-bit Ubuntu quad core
Version 3.9.2
node.js v14.2.0


Wed, 13 May 2020 17:35:52 GMT

MAKE:
mv regexredux.typescript-3.typescript regexredux.typescript-3.ts
/opt/src/node-v14.2.0-linux-x64/bin/tsc --strict --noEmitOnError --removeComments --lib es7 regexredux.typescript-3.ts

4.24s to complete and log all make actions

COMMAND LINE:
/opt/src/node-v14.2.0-linux-x64/bin/node --use_strict  regexredux.typescript-3.js 0 < regexredux-input5000000.txt

PROGRAM OUTPUT:
agggtaaa|tttaccct 356
[cgt]gggtaaa|tttaccc[acg] 1250
a[act]ggtaaa|tttacc[agt]t 4252
ag[act]gtaaa|tttac[agt]ct 2894
agg[act]taaa|ttta[agt]cct 5435
aggg[acg]aaa|ttt[cgt]ccct 1537
agggt[cgt]aa|tt[acg]accct 1431
agggta[cgt]a|t[acg]taccct 1608
agggtaa[cgt]|[acg]ttaccct 2178

50833411
50000000
27388361