techniques to speed up your build pipeline
TRANSCRIPT
Techniques to Speed
Up Your CI Build
[email protected] [email protected]
@AshishParkhi @nashjain
ashishparkhi.com nareshjain.com
About 10 to 12 months back...
About 60 to 90 minutes
Impact on life
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Build Pipeline – Under 10 Minutes
Focus on the
Bottlenecks
Divide and
Conquer
Key Principles to Speed Up
Your Build Pipeline
Fail Fast
Commercial Break
[email protected] [email protected]
@AshishParkhi @nashjain
ashishparkhi.com nareshjain.com
Focus on the
Bottlenecks
Divide and
Conquer
Key Principles to Speed Up
Your Build Pipeline
Fail Fast
Disk IO – Example
File Operations
Focus on Bottleneck
Disk IO – Example
Database operations.
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http://www.dba-oracle.com/images/large_disk_hot_files.gif
Focus on Bottleneck
Disk IO – Alternative
Image Source - http://3.bp.blogspot.com/-bqTjSN7pSpg/UbqyjVojEFI/AAAAAAAADBw/PWe0kiuRHJ4/s200/no+duplicate+content.jpg
• Avoid file operations – e.g. duplicating workspace
Focus on Bottleneck
Disk IO – Alternative
• Avoid file operations – e.g. Jar creation.
Focus on Bottleneck
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Disk IO – Alternative
Image source - http://4.bp.blogspot.com/_4hvqisoH9CE/TSZIs7eiSAI/AAAAAAAAA7E/vanj6bGD8XQ/s1600/big-vs-small-left.jpg
• Test on smaller but apt data set.
Focus on Bottleneck
Disk IO – Alternative
• Robocopy/rsync.
Focus on Bottleneck
Image Source - http://www.asustor.com/images/admv2/022_Rsync%20Backup-The-ultimate-tool-for-remote-backup.png
Disk IO – Alternative - SSD
CrystalDiskMark - http://crystalmark.info/software/CrystalDiskMark/index-e.html
• HDD (Toshiba MQ01ACF050 500GB SATA III) vs SSD (Samsung
PM851 512GB mSata)
Focus on Bottleneck
Disk IO – Alternative - SSD
• HDD SSD
Focus on Bottleneck
Disk IO – Alternative - In Memory DB
Memory (Heap) Engine
– had some limitations over myisam engine.
Focus on Bottleneck
Disk IO – Alternative - In Memory DB
– was not supporting many MySQL queries so was
discarded.
Focus on Bottleneck
Disk IO – Alternative - In Memory DB
database
– looked promising as it could support many MySQL
queries but still required couple of modifications to our
code.
Focus on Bottleneck
Disk IO – Alternative - In Memory DB
– looked most promising as it is wire compatible with
MySQL, which means without code changes I could
just point to memsql and be done with it.
Focus on Bottleneck
Disk IO – Alternative - RAM Drive
• SoftPerfect RAM Disk
Focus on Bottleneck
Disk IO – Alternative – RAM Drive
• RAM Drive
Focus on Bottleneck
Disk IO – Alternative – RAM Drive
• RAM Drive – did not work
Focus on Bottleneck
Disk IO – Alternative – RAM Drive
• RAM Drive – did not work
Focus on Bottleneck
CPU - Profiling
Focus on Bottleneck
CPU – Profiling - Insights
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Scanning resource bundle files from jars.
Focus on Bottleneck
CPU – Profiling - Insights
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Loading Spring Application Context.
Focus on Bottleneck
CPU – Profiling - Insights
Image source - http://dilbert.com/dyn/str_strip/000000000/00000000/0000000/000000/00000/7000/000/7029/7029.strip.gif
Avoiding unnecessary activities during build e.g. sending
out email.
Focus on Bottleneck
CPU – Profiling - Insights
java.util.Calendar is horribly slow.
Total processing time took 20.72 minutes out of which Date
Arithmetic took 18.15 minutes which is about 87.6% of the
total processing time!
Focus on Bottleneck
CPU – Profiling - Insights
java.util.Calendar is horribly slow. We switched to joda date
library and deprecated java.util.Date API.
Now Date Arithmetic takes 1.30 minutes; that’s a massive
saving of 93.77%
Focus on Bottleneck
CPU - ANT 1.7 Junit task options.
Focus on Bottleneck
Focus on the
Bottlenecks
Divide and
Conquer
Key Principles to Speed Up
Your Build Pipeline
Fail Fast
CPU - Running Tests Concurrently
• Create parallel jobs.
Divide and Conquer
CPU - Running Tests Concurrently
• Distribute tasks across multiple slaves.
Divide and Conquer
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CPU - Running Tests Concurrently
Image source - http://sharpreflections.com/wp-content/uploads/2012/06/multi_core_cpu.png
• Using @RunWith(ConcurrentJunitRunner.class).
– Courtesy - Mathieu Carbou http://java.dzone.com/articles/concurrent-
junit-tests
– Maven Surefire plugin has built in mechanism.
Divide and Conquer
Focus on the
Bottlenecks
Divide and
Conquer
Key Principles to Speed Up
Your Build Pipeline
Fail Fast
Restructure The Build Pipeline
Image Source - http://javapapers.com/wp-content/uploads/2012/11/failfast.jpg
• We want our builds to give us fast feedback. Hence it is very important to
prioritise your build tasks based on what is most likely to fail first.
• Push unnecessary stuff to a separate build – Things like JavaDocs can be
done nightly.
• Separate out fast and slow running tests.
Fail Fast
Prioritize Test
• We prioritize and group our tests so that the tests which are fast and
mostly likely to fail are run first.
– ProTest framework
Fail Fast
Incremental Build vs. Clean Build
• Local dev builds are incremental, instead of clean builds, as it helps with
faster feedback and fail fast.
Fail Fast
Now...
Under10minutes
Summary
• Focus on bottlenecks & Shifts in bottlenecks
– Avoid Disk IO - File operations, file based database operations.
– Use smaller datasets, robocopy, rsync.
– Use in-memory databases, Ram Drives, SSDs.
– Perform CPU profiling, scan logs, to uncover the unknown.
– Verify build tool settings.
• Divide and Conquer
– Create smaller jobs that can run in parallel.
– Distribute jobs across multiple slaves.
– Write tests that can run in isolation and use ConcurrentJunitRunner to run them
in parallel.
• Fail Fast
– Restructure the build pipeline to uncover failures soon.
– Incremental Builds
– Prioritize tests.
Build Time Vs No Of BuildsRemoved
Workspace Duplication
Ant Junit Task – Fork Once
Ram Disk
Caching Resource
Caching Spring Context
Avoided Email
Joda DateTime
Deprecated Date API
Concurrent Junit
Runner
Impact on life
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Resources
• Jenkins – http://jenkins-ci.org/
• CI – http://en.wikipedia.org/wiki/Continuous_integration
• Mklink – http://technet.microsoft.com/en-us/library/cc753194.aspx
• http://ant.apache.org/manual/Tasks/junit.html
• http://java.dzone.com/articles/javalangoutofmemory-permgen
• SSD – http://en.wikipedia.org/wiki/Solid-state_drive
• Hybrid disk – http://en.wikipedia.org/wiki/Hybrid_drive
• HSQL – http://hsqldb.org/
• H2 – http://www.h2database.com/html/main.html
• Memsql – http://www.memsql.com/
• MySQL is bazillion times faster than MemSQL
• Tmpfs – http://en.wikipedia.org/wiki/Tmpfs
• http://blog.laptopmag.com/faster-than-an-ssd-how-to-turn-extra-memory-into-a-ram-disk
• RAM Disk Software Benchmarked
• http://jvmmonitor.org/
• http://searchvmware.techtarget.com/tip/VMware-snapshot-size-and-other-causes-for-slow-
snapshots
• http://blogs.agilefaqs.com/2014/10/03/key-principles-for-reducing-continuous-integration-build-
time/
• http://googletesting.blogspot.com/2011/06/testing-at-speed-and-scale-of-google.html
• http://www.infoq.com/presentations/Development-at-Google
• http://crystalmark.info/software/CrystalDiskMark/index-e.html
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Thank you.
[email protected] [email protected]
@AshishParkhi @nashjain
ashishparkhi.com nareshjain.com