| commit | 5cb988334179b4f04a27c59c1e6a888db0dbfc9c | [log] [tgz] |
|---|---|---|
| author | Stephane Landelle <slandelle@gatling.io> | Thu Oct 12 10:41:53 2017 +0200 |
| committer | pascalschumacher <pascalschumacher@gmx.net> | Thu Oct 12 19:31:25 2017 +0200 |
| tree | 42b249367cfe99f47e094ade4700892b6357e988 | |
| parent | 274dbfe81f5f43a47639623c62fc998b5eccd5f0 [diff] |
LANG-1358: Improve StringUtils#replace throughput (closes #300) Motivation: `StringUtils#replace` uses `substring` to append a String region into a StringBuilder. This causes useless copies, as `StringBuilder#append` can take start and end indexes. Modification: Use proper `StringBuilder#append` [overload](https://docs.oracle.com/javase/8/docs/api/java/lang/StringBuilder.html#append-java.lang.CharSequence-int-int-). Result: Based on benchmark from [JOOQ’s post](https://blog.jooq.org/2017/10/11/benchmarking-jdk-string-replace-vs-apache-commons-stringutils-replace): Benchmark Mode Cnt Score Error Units StringReplaceBenchmark.testFastStringReplaceLongStringOneMatch thrpt 21 7546534,219 ± 145523,962 ops/s StringReplaceBenchmark.testStringUtilsReplaceLongStringOneMatch thrpt 21 7353512,552 ± 124498,228 ops/s StringReplaceBenchmark.testFastStringReplaceLongStringSeveralMatches thrpt 21 5077255,810 ± 62358,937 ops/s StringReplaceBenchmark.testStringUtilsReplaceLongStringSeveralMatches thrpt 21 4108357,612 ± 92909,038 ops/s StringReplaceBenchmark.testFastStringReplaceShortStringOneMatch thrpt 21 15911221,949 ± 541064,693 ops/s StringReplaceBenchmark.testStringUtilsReplaceShortStringOneMatch thrpt 21 10677897,475 ± 491091,973 ops/s StringReplaceBenchmark.testFastStringReplaceShortStringSeveralMatches thrpt 21 9271742,251 ± 220150,121 ops/s StringReplaceBenchmark.testStringUtilsReplaceShortStringSeveralMatches thrpt 21 6158829,188 ± 99637,607 ops/s
Apache Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang.
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