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  1. process.stdin.resume();
  2. process.stdin.setEncoding('utf8');
  3.  
  4. var iters = 1000000,
  5.     counter = 1,
  6.     string = "abc0123$%^&*фываЁ",
  7.     etalon = withRegex( string );
  8.  
  9. function withRegex( string ) {
  10.   return string.replace( /[^a-z0-9а-яё]/ig, '' );
  11. };
  12.  
  13. function withRegex2( string ) {
  14.   return string.replace( /[^a-z0-9а-яё]+/ig, '' );
  15. };
  16.  
  17. function withPureJS( string ) {
  18.   var result = '',
  19.       length = string.length;
  20.   for ( var pos = 0; pos < string.length; pos++ ) {
  21.     result += parseChar(string.charCodeAt(pos))
  22.   };
  23.   return result;
  24. };
  25. function parseChar(c) {
  26.   if(( c > 47 && c < 58 ) || ( c > 64 && c < 91 ) || ( c > 96 && c < 123 ) ||
  27.      ( c > 1071 && c < 1104 ) || ( c > 1039 && c < 1072 ) || c == 1105 || c == 1025) {
  28.     return String.fromCharCode(c);
  29.   }
  30.   return '';
  31. }
  32.  
  33. function test( func, string, iters, etalon ) {
  34.   var tStart = Date.now();
  35.   for ( var i=0; i<iters; i++ ) {
  36.       if ( func( string ) !== etalon ) {
  37.         console.log( "error" );
  38.         break;
  39.       };
  40.   };
  41.   var tEnd = Date.now();
  42.   console.log( "test " + counter++, tEnd - tStart );
  43. };
  44.  
  45. console.log( "Test started" );
  46. test( withRegex, string, iters, etalon );
  47. test( withRegex2, string, iters, etalon );
  48. test( withPureJS, string, iters, etalon );
Success #stdin #stdout 2.6s 52064KB
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stdin
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Standard input is empty
stdout
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Test started
test 1 649
test 2 584
test 3 1237
https://ideone.com/Yo5iDE
language:
Node.js (node 11.12.0)
created:
7 years ago
visibility:
public

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