Bug #78825 [Asn->Ver]: stream_socket_client works slower than except

Edit report at https://bugs.php.net/bug.php?id=78825&edit=1 ID: 78825 Updated by: cmb@php.net Reported by: vibbow at hotmail dot com Summary: stream_socket_client works slower than except -Status: Assigned +Status: Verified Type: Bug Package: Performance problem Operating System: Windows Server 2019 PHP Version: 7.3.11 -Assigned To: cmb +Assigned To: Block user comment: N Private report: N New Comment: In the meantime (for whatever reason) I have been able to reproduce a noticeable performance difference. The relevant difference between socket_connect() and the respective part of stream_socket_client() appears to be that the latter switches the socket to non-blocking mode before connect()[1], and then poll()s to wait for the connection to be established. Since there is no poll() on Windows, an emulation[2] is used, which might explain the performance difference. However, if I enforce using the poll emulation on Linux, that's only marginally slower. If I skip setting the socket non-blocking, performance is very close to socket_connect(), but doing so would ignore configured timeouts, and as such is not an option. Another noteworthy difference is that Windows explicitly calls shutdown() and poll() before closesocket() is called[3]. This issue certainly deserves further investigation, but doesn't appear of high priority, so I'm unassigning myself for now. Maybe someone else has some time to look into this? [1] <https://github.com/php/php-src/blob/php-7.3.13/main/network.c#L306> [2] <https://github.com/php/php-src/blob/php-7.3.13/main/network.c#L1197> [3] <https://github.com/php/php-src/blob/php-7.3.13/main/streams/xp_socket.c#L201-L212> Previous Comments: ------------------------------------------------------------------------ [2019-12-23 12:24:06] vibbow at hotmail dot com My server environment is Windows server 2019 (same build number as windows 10 1809) and still can get this reproduced. So this issue is not strict to windows 10 1909 ------------------------------------------------------------------------ [2019-12-23 12:21:44] cmb@php.net Thanks for the update! So far I suspect Windows 10 1909 causing the issue. Will have to check with that version. ------------------------------------------------------------------------ [2019-12-23 12:02:36] vibbow at hotmail dot com Just tried this on a clean install PC. Dell Optiplex 3060, with windows 10 1909 x64 Only PHP and VC runtime, no other software Still can get this reproduced. https://gist.github.com/vibbow/8909ffc9990023129562e8971fe30f7d ------------------------------------------------------------------------ [2019-11-18 23:03:24] vibbow at hotmail dot com I can get this reproduced on my laptop without any virtualization software installed, so it's not virtualizaiton software related issue. Still try to figure out what's the key point to affect this. ------------------------------------------------------------------------ [2019-11-18 19:51:32] vibbow at hotmail dot com I'll try to run this test on two physical machine without any virtualization installed. ------------------------------------------------------------------------ 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=78825 -- Edit this bug report at https://bugs.php.net/bug.php?id=78825&edit=1