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copied!<p>It looks like i've found what is wrong - compilation used in 'my' code (actually taken from internet samples) has nothing to do with 'compiled'. </p> <p>Finally i've got to this link - <a href="https://developer.mozilla.org/en-US/docs/Rhino_JavaScript_Compiler" rel="nofollow">https://developer.mozilla.org/en-US/docs/Rhino_JavaScript_Compiler</a> - the Rhino's tool to compile .js into .class. I've got following result with the same JS code running compiled from .class's bytecode:</p> <pre><code> time: 202ms, chars: 38890, sum: 2046720 time: 92ms, chars: 38890, sum: 2046720 time: 73ms, chars: 38890, sum: 2046720 ... time: 71ms, chars: 38890, sum: 2046720 time: 66ms, chars: 38890, sum: 2046720 time: 64ms, chars: 38890, sum: 2046720 ... 1143ms (per 15 iterations) --- sleep 5 secs --- time: 64ms, chars: 38890, sum: 2046720 time: 52ms, chars: 38890, sum: 2046720 time: 64ms, chars: 38890, sum: 2046720 ... time: 62ms, chars: 38890, sum: 2046720 time: 67ms, chars: 38890, sum: 2046720 time: 67ms, chars: 38890, sum: 2046720 ... 962ms --- sleep 5 secs --- time: 66ms, chars: 38890, sum: 2046720 time: 56ms, chars: 38890, sum: 2046720 time: 59ms, chars: 38890, sum: 2046720 ... time: 69ms, chars: 38890, sum: 2046720 time: 67ms, chars: 38890, sum: 2046720 time: 59ms, chars: 38890, sum: 2046720 ... 966ms </code></pre> <p>(this is roughly 10 time quicker)</p> <p>and this is the result from Chrome:</p> <pre><code> time: 5ms, chars: 38890, sum: 2046720 time: 3ms, chars: 38890, sum: 2046720 time: 1ms, chars: 38890, sum: 2046720 time: 1ms, chars: 38890, sum: 2046720 time: 1ms, chars: 38890, sum: 2046720 time: 5ms, chars: 38890, sum: 2046720 time: 0ms, chars: 38890, sum: 2046720 time: 1ms, chars: 38890, sum: 2046720 time: 1ms, chars: 38890, sum: 2046720 time: 1ms, chars: 38890, sum: 2046720 </code></pre> <p>(average is 3-4 msec, ~15 quicker than compiled Java/Rhino, and ~200 times quicker than interpreted Java/Rhino).</p>

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