https://blog.turboawesome.win/tags/profiling/ Recent content in Profiling on Bits, Trades & Systems Hugo en-us Wed, 01 Apr 2020 10:18:00 +0000 https://blog.turboawesome.win/2020/04/profiling-go-services-in-production-with-pprof/ Wed, 01 Apr 2020 10:18:00 +0000 https://blog.turboawesome.win/2020/04/profiling-go-services-in-production-with-pprof/ Go's pprof tooling is built in, low-overhead, and more useful than most engineers realise. Here's how to capture CPU and memory profiles from production services and actually read what they tell you. https://blog.turboawesome.win/2020/03/go-benchmarks-writing-ones-that-actually-tell-you-something/ Tue, 17 Mar 2020 09:29:00 +0000 https://blog.turboawesome.win/2020/03/go-benchmarks-writing-ones-that-actually-tell-you-something/ Go's built-in benchmark framework is excellent, but it's easy to write benchmarks that measure the wrong thing — compiler optimisations, cache warming artifacts, or benchmark overhead rather than the code under test. https://blog.turboawesome.win/2016/08/heap-dumps-and-flight-recorder-diagnosing-jvm-memory-problems-in-production/ Wed, 24 Aug 2016 14:55:00 +0000 https://blog.turboawesome.win/2016/08/heap-dumps-and-flight-recorder-diagnosing-jvm-memory-problems-in-production/ Heap dumps and Java Flight Recorder are the two tools that diagnose production JVM memory problems. Understanding how to capture them without killing the service, and how to read what they tell you, is a gap in most JVM engineers' toolkits. https://blog.turboawesome.win/2013/11/why-average-latency-is-a-lie-hdrhistogram-and-measuring-what-matters/ Wed, 27 Nov 2013 11:14:00 +0000 https://blog.turboawesome.win/2013/11/why-average-latency-is-a-lie-hdrhistogram-and-measuring-what-matters/ Average latency hides the distribution. HdrHistogram gives you a complete picture of latency across the full range — and it does so without distorting the system you're measuring.