Thanks Rich. Answers below, prefixed by A:. Also added a table of differences between the PHP versions. Cheers ...Steve -----Original Message----- From: richard gray <richgray@xxxxxxxxx> Sent: Tuesday, December 19, 2023 7:43 PM To: Steve Parry <steve.z.parry@xxxxxxxxx>; php-general@xxxxxxxxxxxxx Subject: Re: Significant response time delays between 8.0 and 8.1 On 18/12/2023 21:40, Steve Parry wrote: > Hi Everyone. > > I’m a hobby programmer, so please be kind😊 > > I’m investigating a performance degradation that I have between PHP8.0 > and PHP8.1. I see a couple of similar issues being raised but no > resolutions that I’ve found. > > In my live WordPress system I have HTML/Java scripts that make > multiple ajax calls to PHP scripts on the remote hosted web server. On > upgrading to 8.1 the number of ajax calls failing with timeout > increased dramatically by a factor of between 4 to 8 depending on the > frequency of calls at any one time. > > Examination of a comparison showed scripts were taking up to 15 > seconds under PHP8.1 compared to 1-2 seconds on PHP8.0. > > To isolate the issue I created a simple (non-WordPress) web script > that on the click of an icon uses ajax to send a retrieve request to a > server script. The server test script simply immediately returns one > piece of hardcoded dummy jSON data with no processing. > > Based on the Chrome debugger Network tab, the time of the network > calls triggered from the test script under PHP8.0 are a response of > around 25mS. Under 8.1 the timings are average 92mS. A factor of > about 3.7 slower under 8.1. This has been consistent on two separate > servers. > > My conclusion at this point is that my test setup is reflecting the > same (or worse) time delay factor between PHP8.1 and PHP8.0 as I am > having on the full site. As my test setup is pure HTML/Javascript and > PHP on the server I think this might be an issue with PHP8.1. > > Any advice or assistance is keenly welcomed! Thank you in advance. > > Happy to share my scripts and the URL to the test script. > > Cheers > > …Steve > > Hi Steve Seems strange to me.. a couple of questions... Are the 2 PHP versions configured exactly the same? For example do both have opcache enabled? A: Yes. Zend OPCache running on both. When you ran your comparison tests you ran them using the same server I presume? A: Yes. Are you restarting the services i.e. Apache/PHP-FPM between each test? A: No - The server is a shared hosting server - I have no control over restarting services. The issue is demonstrated by changing the PHP version in the CPanel using MultiPHP Manager - as many times as you like! Rich I did a compare between the PHPInfo from PHP8.0 and PHP8.1 and found the following that might have an impact. As I really don't understand these parameters very well, could you suggest any which may have an impact that I could change? (Not sure how well a text only email will format this, but here we go!): Parameter PHP8.0 PHP8.1 Loaded Configuration File path error in 8.1? allow_url_fopen Off On display_startup_errors Off On Expose_php Off On Log_errors On Off Mail.aff_x_header On Off Max_execution time 600/30 600/600 max_input_time 120/60 120/120 memory_limit 1024/128 1024/1024 output_buffering no value 0 post_max_size 512/2 512/512 variables_order GPCS EGPCS zend.assertions -1 1 PDO drivers Additional PDO drivers seen PDO_ODBC section No PDO_ODBC PDO_ODBC section Pgsql section in 8.1 No Pgsql Pgsql section session.cookie_httponly no value 0 session.gc_divisor 0 100 session.gc_probability 0 1 url_rewriter.tags a=href area=href, frame=src, input=src, form=fakeentry form= Zend OPCache running running Environment section heaps more Variables defined PHP Variables section heaps more Variables defined Many thanks! Cheers ...Steve
