How do you test code that uses just-in-time vs ahead-of-time?

Testing code that uses just-in-time (JIT) compilation versus ahead-of-time (AOT) compilation requires an understanding of how each compilation technique impacts performance and behavior. Below is a brief explanation of both techniques and an example of how to conduct tests.

Just-in-time compilation translates code at runtime, allowing for optimizations based on actual usage patterns, while ahead-of-time compilation translates code before execution, thus giving a performance advantage in startup times but possibly lacking runtime optimizations.

To effectively test code with these two methods, you can run the same function using both compilation types and measure their performance before drawing conclusions.

// JIT Compilation Example function testJIT() { $start = microtime(true); for ($i = 0; $i < 1000000; $i++) { // Sample operation $a = sin($i); } $end = microtime(true); echo "JIT Time: " . ($end - $start) . " seconds\n"; } // AOT Compilation Example function testAOT() { $start = microtime(true); for ($i = 0; $i < 1000000; $i++) { // Sample operation $a = sin($i); } $end = microtime(true); echo "AOT Time: " . ($end - $start) . " seconds\n"; } testJIT(); testAOT();

test code just-in-time ahead-of-time performance compilation

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