https://github.com/Netflix/atlas
Revision 7e015e8b90375f2e623fd9ad059319dc017be414 authored by brharrington on 09 July 2016, 19:38:44 UTC, committed by GitHub on 09 July 2016, 19:38:44 UTC
Changes the primitive maps to resize at 50% full rather than 70%. The 70% factor was originally chosen to keep the memory use lower and for the primary use-cases we didn't see much performance degradation at the time. Rolling it out to more systems though we have started seeing cases where it performs quite badly and 50% does an order of magnitude better. JMH test with a simple example included. ``` 0.7 [info] Benchmark Mode Cnt Score Error Units [info] IntIntMap.testIntIntHashMap800 thrpt 10 10374.640 ± 782.568 ops/s [info] IntIntMap.testIntIntHashMap8k thrpt 10 589.537 ± 8.124 ops/s [info] IntIntMap.testJavaHashMap800 thrpt 10 4051.768 ± 499.362 ops/s [info] IntIntMap.testJavaHashMap8k thrpt 10 2846.103 ± 14.858 ops/s 0.5 [info] Benchmark Mode Cnt Score Error Units [info] IntIntMap.testIntIntHashMap800 thrpt 10 11713.871 ± 271.158 ops/s [info] IntIntMap.testIntIntHashMap8k thrpt 10 3963.805 ± 59.359 ops/s [info] IntIntMap.testJavaHashMap800 thrpt 10 4371.380 ± 93.346 ops/s [info] IntIntMap.testJavaHashMap8k thrpt 10 2709.591 ± 71.376 ops/s ```
1 parent 0c0fb6c
Tip revision: 7e015e8b90375f2e623fd9ad059319dc017be414 authored by brharrington on 09 July 2016, 19:38:44 UTC
adjust load factor for primitive maps (#390)
adjust load factor for primitive maps (#390)
Tip revision: 7e015e8
File | Mode | Size |
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Bintray.scala | -rw-r--r-- | 1.6 KB |
Build.scala | -rw-r--r-- | 4.7 KB |
BuildSettings.scala | -rw-r--r-- | 691 bytes |
Dependencies.scala | -rw-r--r-- | 3.5 KB |
GitVersion.scala | -rw-r--r-- | 2.0 KB |
License.scala | -rw-r--r-- | 2.8 KB |
build.properties | -rw-r--r-- | 20 bytes |
plugins.sbt | -rw-r--r-- | 500 bytes |
sbt | -rwxr-xr-x | 513 bytes |
sbt-launch.jar | -rwxr-xr-x | 1.2 MB |
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