Other example: 

for ( 1 .. 100_000 ) {
    $x .= ('x' x 1_000);
}

[download]
Linux: 0.4 seconds. Windows: 20 minutes.

Updated: this code was discovered at August 2007.

In reply to Re: Why is Windows 100 times slower than Linux when growing a large scalar? by explorer
in thread Why is Windows 100 times slower than Linux when growing a large scalar? by Anonymous Monk

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