Top tips and tools for optimising Haskell | Pusher blog
(This blog post discusses CPU time profiling, but not space (memory) profiling. We’ll come back to that in a Part 2.) We use a range of different programming languages at Pusher and are always looking for ways to squeeze every bit of performance from them. Recently, I’ve been on a project to explore what other \[…\] (This blog post discusses CPU time profiling, but not space (memory) profiling. We
Perf for low-level profiling - School of Haskell | School of Haskell
Interactive code snippets not yet available for SoH 2.0, see our Status of of School of Haskell 2.0 blog post perf and low-level Haskell programsTL;DR: perf can be particularly helpful when profiling performance critical sections of your programs. We show how through an example. The perf_events framework in the linux kernel, together with the perf userland tools, can be used to profile application
Tutorial: Profiling Cabal projects
Profiling in Haskell can be an overwhelmingly confusing task. There’s plenty of little things you need to set up right to be able to perform it. This post aims to organize this information. Summary The project must be configured with profiling enabled. Some specific options must be set when configuring the profiling executable in the “.cabal†file. All the project’s dependencies must be installed
Performance profiling with ghc-events-analyze - Well-Typed - The Haskell Consultants
ghc-events-analyze is a new simple Haskell profiling tool that uses GHC's eventlog system. It helps with some profiling use cases that are not covered by the existing GHC profiling modes or tools. It has two major features: While ThreadScope shows CPU activity across all your cores, ghc-events-analyze shows CPU activity across all your Haskell threads.It lets you label periods of time during progr
Tools for analyzing performance of a Haskell program
how to find out why this solution is so slow. Are there any commands that tell me where most of the computation-time is spend so I know which part of my haskell-program is slow? Precisely! GHC provides many excellent tools, including: runtime statistics time profiling heap profiling thread analysis core analysis. comparative benchmarking GC tuning A tutorial on using time and space profiling is pa
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Kazuho@Cybozu Labs: MySQL ã®ãƒœãƒˆãƒ«ãƒãƒƒã‚¯ã‚’統計的ã«ç›£è¦–・解æžã™ã‚‹æ–¹æ³•
MySQL ã®ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã€ã¨è¨€ã£ãŸå ´åˆã«ã¯ã€ã‚µãƒ¼ãƒãƒ¼ãƒ‘ラメータã®èª¿æ•´ã‚„ EXPLAIN コマンドを利用ã—ãŸã‚¯ã‚¨ãƒªå®Ÿè¡Œè¨ˆç”»ã®æœ€é©åŒ–ãŒè©±é¡Œã«ä¸Šã‚‹ã“ã¨ãŒå¤šã„ã§ã™ã€‚ã—ã‹ã—ã€ç™ºè¡Œã™ã‚‹å…¨ã¦ã® SQL ã«ã¤ã„ã¦ã€ã„ã¡ã„ã¡ EXPLAIN コマンドを使ã£ã¦ç¢ºèªã—ã¦ã„ã¦ã¯ã€ã„ãら時間ãŒã‚ã£ã¦ã‚‚ãŸã‚Šã¾ã›ã‚“。ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã‚’効率的ã«é€²ã‚ã‚‹ã«ã¯ã€ã¾ãšã€ãƒœãƒˆãƒ«ãƒãƒƒã‚¯ã¨ãªã£ã¦ã„ã‚‹ SQL クエリを特定ã—ã€æ¬¡ã«ãã®æœ€é©åŒ–ã‚’è¡Œã†ã¹ãã§ã™ã€‚ ã§ã¯ã©ã®ã‚ˆã†ã«ã—ã¦ã€ãƒœãƒˆãƒ«ãƒãƒƒã‚¯ã‚’特定ã™ã‚‹ã®ã‹ã€‚MySQL Conference & Expo 2009 ã®ã‚ーノートã«ãŠã„㦠Mark Callaghan æ°ã¯ã€Google ã§ã¯ SHOW PROCESSLIST コマンドを使ã£ãŸçµ±è¨ˆçš„アプãƒãƒ¼ãƒã‚’使ã£ã¦ã„ã‚‹ã¨è¿°ã¹ã¦ã„らã£ã—ゃã„ã¾ã™ (å‚ç…§: MySQLConf 09: Mark Callaghan, "This is Not a
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