DEPRECATED AND FAIL RegExp.compile is useful and not deprecated.js

// Sorry. Hack fail :(
// "Speedup" in opera and chrome because bugs in webkit (compile return undefined)
// and opera (invalid regexp object return).
// Giant thanks to @jdalton and @diegoperini
var i,n=20000;
var i=0;
var t="";

for(i=0;i<10000;++i)
  t+=" a";

var d=+(new Date());
for(i=0;i<n;++i)
  t.replace(/\s+/,"");
alert("1: "+(+(new Date())-d));

var re=/\s+/;
var d=+(new Date());
for(i=0;i<n;++i)
  t.replace(re,"");
alert("2: "+(+(new Date())-d));
  
var re=new RegExp(/\s+/);
var d=+(new Date());
for(i=0;i<n;++i)
  t.replace(re,"");
alert("3: "+(+(new Date())-d));

var re=/\s+/.compile(/\s+/);
var d=+(new Date());
for(i=0;i<n;++i)
  t.replace(re,"");
alert("4: "+(+(new Date())-d));

/*
Chrome
1: 1017
2: 971
3: 972
4: 590

ff3.6
1: 478ms
2: 474ms
3: 470ms
4: 483ms

ie7
1: 671
2: 641
3: 641
4: 661

opera 10.10
1: 1342
2: 1342
3: 1221
4: 521
*/