I am biased towards my product Tideways , alternatively you can check out Sentry, Blackfire or Datadog. Each of them runs on production. If you can reproduce this on development then Xdebug. Source: 7 months ago

In a case like that iam usually using s tool like https://tideways.com/ to search for PHP or MySQL bottlenecks. It basically strips down every function or database query and Monitors it in realtime. There is a 14 day trial if you just want to use it once 😬. Source: over 1 year ago

Last time I looked NewRelic's PHP experience wasn't quite there. Blackfire has been advertising an APM for ages but when I checked in April it still wasn't released to everyone. The one which never seems to appear on Google when people go looking for one is https://tideways.com/. I've used it multiple times with clients and it finds the problems in minutes. Another up-and-coming PHP profiler is from DataDog.... - Source: Hacker News / about 2 years ago

Https://tideways.com/ however does and is a _fantastic_ alternative to NewRelic for PHP codebases. I've no link to it other than as a satisfied customer. It's saved me loads of time, usually in crisis moments when there's no time to spend on debugging the production service because things have to work again. - Source: Hacker News / about 2 years ago

If that does not help much I recommend using a APM like tideways or newrelic ( both have good free plans ) . Both can help dwell down where time is going. If you wish to go the free route you can explore xdebug ( Not easy but get the job done ). Source: about 3 years ago

In k6 Cloud, from one or multiple geographic locations. - Source: dev.to / almost 3 years ago