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by SaraMG
4478 days ago
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On the scale of a single request (doing stuff from the command line), most benchmarks I've seen are about half the memory footprint. Obviously that's going to vary program to program ($data = file_get_contents("some2gbfile.txt"); is going to take 2GB, regardless), but for "normal usage" 1/2 looks fairly common. On a webserver, that goes further since HHVM is single-process/multi-thread, whereas PHP (in its typical setup) is multi-process/single-thread. This cuts HHVM's memory overhead much further. Yes, PHP can run multi-threaded, but it still has a number of instability issues in that mode. |
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