hhvm | 易学教程

Nginx PHP Failing with Large File Uploads (Over 6 GB)

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问题 I am having a very weird issue uploading larges files over 6GB. My process works like this: Files are uploaded via Ajax to an php script. The PHP upload script takes the $_FILE and copies it over in chunks, as in this answer to a tmp location. The location of the file is stored in the db A cron script will upload the file to s3 at a later time, again using fopen functions and buffering to keep memory usage low My PHP(HHVM) and NGINX configuration both have their configuration set to allow up

HHVM poor performance

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I'm evaluating HipHop-PHP for compatibility and performance on our code base, but I'm getting very poor performance when running it with the built-in web server enabled. I have the following sample test program that calculates a Fibonacci sequence. ex3.php: function fib($n) { if ($n <= 2) return 1; else return fib($n-1) + fib($n-2); } $n = 36; printf("fib(%d) = %d\n", $n, fib($n, 2)); When I run this through HHVM using the command-line, I get impressive results: time hhvm -v"Eval.Jit=true" -f ./ex3.php fib(36) = 14930352 real 0m0.267s user 0m0.248s sys 0m0.020s Compare this with standard PHP:

Is time() guaranteed to be leap-second aware?

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问题 PHP manual states that time() returns&puncsp;"the current UNIX timestamp" ᴀ&puncsp;and microtime() returns the&puncsp;"current Unix timestamp with microseconds" ʙ. However, are these functions guaranteed to behave like that of strictly conforming POSIX.1 systems? Specifically, do leap seconds get inserted in such a way that the output of time() &hairsp;|&hairsp; microtime() jump backwards by 1 second at the start of the next day, (which is the also at the end of the leap second,) giving

HHVM+Hacklang: errors/warnings output into browser

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问题 Is there any way to tell HHVM to output Hacklang warnings and errors into the browser? Something like PHP does with enabled display_errors , display_startup_errors and error_reporting set to E_ALL HHVM version: $ php -v HipHop VM 3.1.0-dev+2014.04.09 (rel) Compiler: heads/master-0-g4fc811c64c23a3686f66a2bea80ba47f3eaf9f3d Repo schema: 79197c935790c0b9c9cb13566c3e727ace368117 I've tried the following config: $ cat /etc/hhvm/php.ini ; php options display_startup_errors = On error_reporting = E

HHVM poor performance

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问题 I'm evaluating HipHop-PHP for compatibility and performance on our code base, but I'm getting very poor performance when running it with the built-in web server enabled. I have the following sample test program that calculates a Fibonacci sequence. ex3.php: function fib($n) { if ($n <= 2) return 1; else return fib($n-1) + fib($n-2); } $n = 36; printf("fib(%d) = %d\n", $n, fib($n, 2)); When I run this through HHVM using the command-line, I get impressive results: time hhvm -v"Eval.Jit=true" -f