Make Big Things Run Again! Insights on Eclipse Platform Performance Tunings (EclipseCon 2018)

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MAKE BIG THINGS  RUN AGAIN! Karsten Thoms - itemis AG INSIGHTS ON ECLIPSE PLATFORM PERFORMANCE TUNINGS

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About • Since 2003 @itemis • Background with Enterprise Applications • Specialised in Language Engineering, Code Generation, Toolchain Development, DevOps • Eclipse Committer since 10 years • Open Source / Eclipse Evangelist @kthoms @itemis @yourkit #performance @jcon_conference https://github.com/kthoms

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xxxxxxxxxxxx When you wait for your IDE

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https://www.ﬂickr.com/photos/bagogames/24707027581  "The Flash: "Fast Lane" Review - Face Punching Galore“. © BagoGames under CC BY 2.0 SPEED !

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Where performance matters • Startup Time • UI Responsiveness • Project Build • p2 (Software Install / Update) • Operations on large data sets • Memory Consumption • Garbage Collection …

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Also small improvements matter

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If something is slower than expected… Start a Proﬁler and measure your use case !

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@jcon_conference @yourkit #performance @kthoms @itemis WHAT YOU’LL SEE

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Performance work   in Photon & 2018-09

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Search Tree Expansion

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Search Tree Expansion

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Startup Time Fedora Linux

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Single Thread Build

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Parallel Project Build

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Parallel Project Build

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macOS SWT Event Dispatching

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Import Projects from Git Repository

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Throttler API

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Throttler API

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Fixed UI Freezes • Bug#539470: Opening package in the Project Explorer in hierarchical presentation mode • Bug#533230: EGit Repositories view blocks Eclipse on startup • Bug#533198: EGit Branch name page on large repositories • Bug#520069: Suppress label recalculation in tree viewers on ﬁlter change Thanks to @bananeweizen

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String#replaceAll

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https://bugs.eclipse.org/bugs/show_bug.cgi?id=532072

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Check for Updates https://bugs.eclipse.org/bugs/show_bug.cgi?id=532190

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Avoid Exceptions as Return Value https://bugs.eclipse.org/bugs/show_bug.cgi?id=522103

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Avoid Exceptions as Return Value

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Avoid Exceptions as Return Value WhitespaceCharacterPainter#drawLineRange ----------------------------------------- Time #IAE Before 4959ms 10763 After 3384ms 0

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Memory Proﬁling

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Zero Length Arrays https://bugs.eclipse.org/bugs/show_bug.cgi?id=532545

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Zero Length Arrays

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Zero Length Arrays https://bugs.eclipse.org/bugs/show_bug.cgi?id=532364

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Zero Length Arrays https://bugs.eclipse.org/bugs/show_bug.cgi?id=532364

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Optimize Data Structures https://bugs.eclipse.org/bugs/show_bug.cgi?id=519085

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Optimize Data Structures https://bugs.eclipse.org/bugs/show_bug.cgi?id=519085

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Optimize Data Structures https://bugs.eclipse.org/bugs/show_bug.cgi?id=519085

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ClasspathAccessRule

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https://bugs.eclipse.org/bugs/show_bug.cgi?id=532505

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With introduced Cache

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but…

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Regression :( https://bugs.eclipse.org/bugs/show_bug.cgi?id=536990 Delivered with Photon Fixed in 2018-09

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Performance Tests

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Performance Tests

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Challenges • Code must be backward compatible => No API change • Makes usage of new concurrent patterns hard to impossible  => Blocks multi-threading and non-blocking processes • SWT: Native skills

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Slow scrolling on macOS https://bugs.eclipse.org/bugs/show_bug.cgi?id=366471

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Slow scrolling on macOS

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Text Search with many fast results https://bugs.eclipse.org/bugs/show_bug.cgi?id=535752

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Processing in UI Thread

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Still many freezes

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Java Project Wizard

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Java Project Wizard http://eclip.se/eY

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Startup Time

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Challenges • Preserving API Compatibility • Makes usage of new concurrent patterns hard to impossible  => Blocks multi-threading and non-blocking processes • SWT: Deep Native knowledge required • Regressions

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Every small improvement in platform is saving time, money and nerves for millions of developers every day

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We need your help! https://pixabay.com/de/usa-uncle-sam-i-want-you-armee-49909/