The Computer Language
Benchmarks Game

regex-redux Node.js #2 program

source code

// The Computer Language Benchmarks Game
// http://benchmarksgame.alioth.debian.org/
//
// 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

var fs = require('fs'), i = fs.readFileSync('/dev/stdin', 'ascii'),
  ilen = i.length, clen, j,
  q = [/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],

  b = [
    "-",    /\|[^|][^|]*\|/g, 
    "|",   /<[^>]*>/g, 
    "<2>", /a[NSt]|BY/g, 
    "<3>", /aND|caN|Ha[DS]|WaS/g, 
    "<4>", /tHa[Nt]/g  
    ];

i = i.replace(/^>.*\n|\n/mg, '');
clen = i.length;
for(j = 0; j<q.length; ++j) {
  var qj = q[j], m = i.match(qj);
  console.log(qj.source, m ? m.length : 0);
}
while(b.length) i = i.replace(b.pop(), b.pop());
console.log(["", ilen, clen, i.length].join("\n"));
    

notes, command-line, and program output

NOTES:
64-bit Ubuntu quad core
v8.4.0


Fri, 01 Sep 2017 06:15:32 GMT

MAKE:
cp -L regexredux.node-2.node regexredux.node-2.js

0.01s to complete and log all make actions

COMMAND LINE:
/usr/local/src/node-v8.4.0-linux-x64/bin/node regexredux.node-2.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