RFR: 8310929: Optimization for Integer.toString [v16]

[温绍锦]

> Optimization for:
> Integer.toString
> Long.toString
> StringBuilder#append(int)
> 
> # Benchmark Result
> 
> 
> sh make/devkit/createJMHBundle.sh
> bash configure --with-jmh=build/jmh/jars
> make test TEST="micro:java.lang.Integers.toString*" 
> make test TEST="micro:java.lang.Longs.toString*" 
> make test TEST="micro:java.lang.StringBuilders.toStringCharWithInt8"
> 
> 
> ## 1. [aliyun_ecs_c8i.xlarge](https://help.aliyun.com/document_detail/25378.html#c8i)
> * cpu : intel xeon sapphire rapids (x64)
> 
> ``` diff
> -Benchmark               (size)  Mode  Cnt  Score   Error  Units (baseline)
> -Integers.toStringBig       500  avgt   15  6.825 ± 0.023  us/op
> -Integers.toStringSmall     500  avgt   15  4.823 ± 0.023  us/op
> -Integers.toStringTiny      500  avgt   15  3.878 ± 0.101  us/op
> 
> +Benchmark               (size)  Mode  Cnt  Score   Error  Units (PR Update 04 f4aa1989)
> +Integers.toStringBig       500  avgt   15  6.002 ± 0.054  us/op (+13.71%)
> +Integers.toStringSmall     500  avgt   15  4.025 ± 0.020  us/op (+19.82%)
> +Integers.toStringTiny      500  avgt   15  3.874 ± 0.067  us/op (+0.10%)
> 
> -Benchmark            (size)  Mode  Cnt  Score   Error  Units (baseline)
> -Longs.toStringBig       500  avgt   15  9.224 ± 0.021  us/op
> -Longs.toStringSmall     500  avgt   15  4.621 ± 0.087  us/op
> 
> +Benchmark            (size)  Mode  Cnt  Score   Error  Units (PR Update 04 f4aa1989)
> +Longs.toStringBig       500  avgt   15  7.483 ± 0.018  us/op (+23.26%)
> +Longs.toStringSmall     500  avgt   15  4.020 ± 0.016  us/op (+14.95%)
> 
> -Benchmark                           Mode  Cnt     Score    Error  Units (baseline)
> -StringBuilders.toStringCharWithInt8 avgt   15    89.327 ±  0.733  ns/op
> 
> +Benchmark                            Mode  Cnt   Score   Error  Units (PR Update 04 f4aa1989)
> +StringBuilders.toStringCharWithInt8  avgt   15  36.639 ± 0.422  ns/op (+143.80%)
> 
> 
> 
> ## 2. [aliyun_ecs_c8a.xlarge](https://help.aliyun.com/document_detail/25378.html#c8a)
> * cpu : amd epc genoa (x64)
> 
> ``` diff
> -Benchmark               (size)  Mode  Cnt  Score   Error  Units (baseline)
> -Integers.toStringBig       500  avgt   15  6.753 ± 0.007  us/op
> -Integers.toStringSmall     500  avgt   15  4.470 ± 0.005  us/op
> -Integers.toStringTiny      500  avgt   15  2.764 ± 0.020  us/op
> 
> +Benchmark               (size)  Mode  Cnt  Score   Error  Units (PR Update 04 f4aa1989)
> +Integers.toStringBig       500  avgt   15  5.036 ± 0.005  us/op (+34.09%)
> +Integers.toStringSmall     500  avgt   15  3.491 ± 0.025  us/op (+28.04%)
> +Integers.toStringTiny      5...

温绍锦 has updated the pull request incrementally with 736 additional commits since the last revision:

 - 8303427: Fixpath confused if unix root contains "/jdk"
   
   Reviewed-by: mikael
 - 8314319: LogCompilation doesn't reset lateInlining when it encounters a failure.
   
   Reviewed-by: ecaspole, kvn
 - 8258970: Disabled JPasswordField foreground color is wrong with GTK LAF
   
   Reviewed-by: tr, dnguyen, psadhukhan
 - 8315195: RISC-V: Update hwprobe query for new extensions
   
   Reviewed-by: fyang, fjiang, luhenry
 - 8315446: G1: Remove unused G1AllocRegion::attempt_allocation
   
   Reviewed-by: iwalulya, tschatzl
 - 8315098: Improve URLEncodeDecode microbenchmark
   
   Reviewed-by: ecaspole, dfuchs
 - 8315321: [aix] os::attempt_reserve_memory_at must map at the requested address or fail
   
   Reviewed-by: mdoerr
 - 8315436: HttpsServer does not send TLS alerts
   
   Reviewed-by: dfuchs, michaelm
 - 8315069: Relativize extended_sp in interpreter frames
   
   Reviewed-by: haosun, aph, fyang
 - 8313983: jmod create --target-platform should replace existing ModuleTarget attribute
   
   Reviewed-by: alanb, mchung
 - ... and 726 more: https://git.openjdk.org/jdk/compare/cf2f8395...a635f903

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/14699/files
  - new: https://git.openjdk.org/jdk/pull/14699/files/cf2f8395..a635f903

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14699&range=15
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14699&range=14-15

  Stats: 156684 lines in 3194 files changed: 65663 ins; 71956 del; 19065 mod
  Patch: https://git.openjdk.org/jdk/pull/14699.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14699/head:pull/14699

PR: https://git.openjdk.org/jdk/pull/14699