Bug #73412 [Nab]: url-wrappers in PHP7 terrible slow

Edit report at https://bugs.php.net/bug.php?id=73412&edit=1 ID: 73412 User updated by: spam2 at rhsoft dot net Reported by: spam2 at rhsoft dot net Summary: url-wrappers in PHP7 terrible slow Status: Not a bug Type: Bug Package: Performance problem Operating System: Linux PHP Version: 7.0.12 Block user comment: N Private report: N New Comment: since the script now has a $use_curl param where this does not happen and you can make 5000 requests instead 5 in the same time with nothing else changed hardly something in the environment or on the webserver which is contacted (local machine) pretty sure something wrong on the PHP side a single call returns immediately __________________________ [harry@srv-rhsoft:/mnt/data/downloads]$ time php -r "get_headers('http://corecms/index.php');" real 0m0.057s user 0m0.035s sys 0m0.015s [harry@srv-rhsoft:/mnt/data/downloads]$ time php -r "get_headers('http://corecms/static.htm');" real 0m0.056s user 0m0.041s sys 0m0.013s [harry@srv-rhsoft:/mnt/data/downloads]$ time php -r "get_headers('http://corecms/static.php');" real 0m0.043s user 0m0.032s sys 0m0.009s Previous Comments: ------------------------------------------------------------------------ [2016-10-31 08:15:25] nikic@php.net Okay, so the trace includes a bunch of 3 second timeouts like 18606 09:07:06.754991 poll([{fd=3, events=POLLIN}], 1, 3000) = 0 (Timeout) <3.003119> That is clearly the reason for the immense slowdown. Now need to figure out what the cause is :) ------------------------------------------------------------------------ [2016-10-31 08:10:19] spam2 at rhsoft dot net i have no expierience with perf tools but if you would instruct me,,, in the meantime two straces: strace -Ff -tt -T -o out.txt php -r "get_headers('http://corecms/static.htm');" http://access.thelounge.net/harry/get_headers_strace_small.txt strace -Ff -tt -T -o out.txt php /www/corecms.rhsoft.net/response-times.php http://access.thelounge.net/harry/get_headers_strace.txt ------------------------------------------------------------------------ [2016-10-31 08:03:27] rasmus@php.net I think a perf report would be more useful, but if you do an strace, use these flags: strace -Ff -tt -T -o out.txt php -r "get_headers('http://corecms/static.htm');" ------------------------------------------------------------------------ [2016-10-31 07:44:34] nikic@php.net Could you please provide an strace trace for what happens in the get_headers() case? ------------------------------------------------------------------------ [2016-10-31 07:35:44] spam2 at rhsoft dot net same behavior with your code (replaced the URL and changed 1000 to 20 because otherwise i would need to wait until next week) [harry@srv-rhsoft:/downloads]$ php test.php 0.081186056137085 3.1035280227661 the same when it's running within the webserver interesting that the profiling script used between "make prof-gen" and "make prof-use" is also doing a ton of file_get_contents on a temporary started webserver on 127.0.0.1:9000 does not suffer from this problem (not within the build-process and also not with the fallback using the installed binaries) while i have serveral scripts using file_get_contents() or get_headers() which got magnitudes slower one of them lists all files recursive and does blind requests to any possible URL to find includes which are not proper protected against direct calls and that one would take months to finish while with curl it's pretty fast ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=73412 -- Edit this bug report at https://bugs.php.net/bug.php?id=73412&edit=1