{"guid":"61f09104-4a44-51db-9e8b-804307624776","title":"Do you trust profilers? I once did too","subtitle":null,"slug":"gpn21-98-do-you-trust-profilers-i-once-did-too","link":"https://cfp.gulas.ch/gpn21/talk/VFBQ88/","description":"Profilers are great tools in your toolbox, like debuggers, when solving problems with your Java application (I've been on a podcast on this topic recently). I'll tell you some of their problems and a technique to cope with them in this talk.\n\nThere are many open-source profilers, most notably JFR/JMC, and async-profiler, that help you to find and fix performance problems. But they are just software themself, interwoven with a reasonably large project, the OpenJDK (or OpenJ9, for that matter), and thus suffer from the same problems as the typical problems of application they are used to profile.","original_language":"eng","persons":["Johannes Bechberger"],"view_count":215,"promoted":false,"date":"2023-06-11T13:15:00.000+02:00","release_date":"2023-06-11T00:00:00.000+02:00","updated_at":"2025-09-11T13:15:06.993+02:00","tags":["gpn21","98","2023","Software \u0026 Infrastructure"],"length":1922,"duration":1922,"thumb_url":"https://static.media.ccc.de/media/events/gpn/gpn21/98-61f09104-4a44-51db-9e8b-804307624776.jpg","poster_url":"https://static.media.ccc.de/media/events/gpn/gpn21/98-61f09104-4a44-51db-9e8b-804307624776_preview.jpg","timeline_url":"https://static.media.ccc.de/media/events/gpn/gpn21/98-61f09104-4a44-51db-9e8b-804307624776.timeline.jpg","thumbnails_url":"https://static.media.ccc.de/media/events/gpn/gpn21/98-61f09104-4a44-51db-9e8b-804307624776.thumbnails.vtt","frontend_link":"https://media.ccc.de/v/gpn21-98-do-you-trust-profilers-i-once-did-too","url":"https://api.media.ccc.de/public/events/61f09104-4a44-51db-9e8b-804307624776","conference_title":"Gulaschprogrammiernacht 21","conference_url":"https://api.media.ccc.de/public/conferences/gpn21","related":[],"recordings":[{"size":158,"length":1922,"mime_type":"video/webm","language":"eng","filename":"gpn21-98-eng-Do_you_trust_profilers_I_once_did_too_webm-hd.webm","state":"new","folder":"webm-hd","high_quality":true,"width":1920,"height":1080,"updated_at":"2023-06-12T17:41:23.773+02:00","recording_url":"https://cdn.media.ccc.de/events/gpn/gpn21/webm-hd/gpn21-98-eng-Do_you_trust_profilers_I_once_did_too_webm-hd.webm","url":"https://api.media.ccc.de/public/recordings/67046","event_url":"https://api.media.ccc.de/public/events/61f09104-4a44-51db-9e8b-804307624776","conference_url":"https://api.media.ccc.de/public/conferences/gpn21"},{"size":72,"length":1922,"mime_type":"video/webm","language":"eng","filename":"gpn21-98-eng-Do_you_trust_profilers_I_once_did_too_webm-sd.webm","state":"new","folder":"webm-sd","high_quality":false,"width":720,"height":576,"updated_at":"2023-06-11T15:58:41.870+02:00","recording_url":"https://cdn.media.ccc.de/events/gpn/gpn21/webm-sd/gpn21-98-eng-Do_you_trust_profilers_I_once_did_too_webm-sd.webm","url":"https://api.media.ccc.de/public/recordings/67024","event_url":"https://api.media.ccc.de/public/events/61f09104-4a44-51db-9e8b-804307624776","conference_url":"https://api.media.ccc.de/public/conferences/gpn21"},{"size":56,"length":1922,"mime_type":"video/mp4","language":"eng","filename":"gpn21-98-eng-Do_you_trust_profilers_I_once_did_too_sd.mp4","state":"new","folder":"h264-sd","high_quality":false,"width":720,"height":576,"updated_at":"2023-06-11T15:14:58.212+02:00","recording_url":"https://cdn.media.ccc.de/events/gpn/gpn21/h264-sd/gpn21-98-eng-Do_you_trust_profilers_I_once_did_too_sd.mp4","url":"https://api.media.ccc.de/public/recordings/67019","event_url":"https://api.media.ccc.de/public/events/61f09104-4a44-51db-9e8b-804307624776","conference_url":"https://api.media.ccc.de/public/conferences/gpn21"},{"size":20,"length":1922,"mime_type":"audio/opus","language":"eng","filename":"gpn21-98-eng-Do_you_trust_profilers_I_once_did_too_opus.opus","state":"new","folder":"opus","high_quality":false,"width":0,"height":0,"updated_at":"2023-06-11T15:10:02.704+02:00","recording_url":"https://cdn.media.ccc.de/events/gpn/gpn21/opus/gpn21-98-eng-Do_you_trust_profilers_I_once_did_too_opus.opus","url":"https://api.media.ccc.de/public/recordings/67016","event_url":"https://api.media.ccc.de/public/events/61f09104-4a44-51db-9e8b-804307624776","conference_url":"https://api.media.ccc.de/public/conferences/gpn21"},{"size":29,"length":1922,"mime_type":"audio/mpeg","language":"eng","filename":"gpn21-98-eng-Do_you_trust_profilers_I_once_did_too_mp3.mp3","state":"new","folder":"mp3","high_quality":false,"width":0,"height":0,"updated_at":"2023-06-11T15:07:20.127+02:00","recording_url":"https://cdn.media.ccc.de/events/gpn/gpn21/mp3/gpn21-98-eng-Do_you_trust_profilers_I_once_did_too_mp3.mp3","url":"https://api.media.ccc.de/public/recordings/67014","event_url":"https://api.media.ccc.de/public/events/61f09104-4a44-51db-9e8b-804307624776","conference_url":"https://api.media.ccc.de/public/conferences/gpn21"},{"size":175,"length":1922,"mime_type":"video/mp4","language":"eng","filename":"gpn21-98-eng-Do_you_trust_profilers_I_once_did_too_hd.mp4","state":"new","folder":"h264-hd","high_quality":true,"width":1920,"height":1080,"updated_at":"2023-06-11T14:58:41.744+02:00","recording_url":"https://cdn.media.ccc.de/events/gpn/gpn21/h264-hd/gpn21-98-eng-Do_you_trust_profilers_I_once_did_too_hd.mp4","url":"https://api.media.ccc.de/public/recordings/67011","event_url":"https://api.media.ccc.de/public/events/61f09104-4a44-51db-9e8b-804307624776","conference_url":"https://api.media.ccc.de/public/conferences/gpn21"}]}