regex-redux Node js #4 program

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

   regex-dna program contributed by Jesse Millikan
   Base 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
   sequential by Isaac Gouy
*/

const fs = require('fs');

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;

    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 = 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;

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

mainThread();

    

NOTES:
64-bit Ubuntu quad core
v14.2.0


Thu, 07 May 2020 02:22:58 GMT

MAKE:
cp -L regexredux.node-4.node regexredux.node-4.js

0.21s to complete and log all make actions

COMMAND LINE:
/opt/src/node-v14.2.0-linux-x64/bin/node regexredux.node-4.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