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> The JIT — just in time — compiler promises significant performance improvements ... There haven't been any accurate benchmarks done at this point, but they sure will come.

They wrote a new compiler, for performance reasons, and don't have any accurate benchmarks? Really?

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The only benchmarks done before adding it to the core were on maths-heavy code samples, something PHP is seldom used for.

You can read about it here: https://stitcher.io/blog/php-jit

I'm confused about this feature in general actually. Isn't the whole point of PHP's "simplicity" that each request creates a new interpreter process? So you're always in a "cold" state?

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