System.Text.Tests.Perf_StringBuilder.Append_Char_Capacity has regressed on x86 #67854
Description
System.Text.Tests.Perf_StringBuilder.Append_Char_Capacity has regressed a lot on x86.
Looking at the commit diff it's most likely caused by #66618 (cc @AndyAyersMS )
Repro:
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_monthly.py net7.0-preview2 net7.0-preview3 --filter System.Text.Tests.Perf_StringBuilder.Append_Char_Capacity --architecture x86System.Text.Tests.Perf_StringBuilder.Append_Char_Capacity(length: 100000)
| Result | Ratio | Operating System | Bit | Processor Name |
|---|---|---|---|---|
| Same | 0.97 | Windows 11 | X64 | AMD Ryzen Threadripper PRO 3945WX 12-Cores |
| Same | 1.00 | Windows 11 | X64 | Intel Core i7-8700 CPU 3.20GHz (Coffee Lake) |
| Same | 1.00 | Windows 11 | X64 | Intel Core i9-9900T CPU 2.10GHz |
| Same | 0.97 | alpine 3.13 | X64 | Intel Core i7-7700 CPU 3.60GHz (Kaby Lake) |
| Same | 1.00 | centos 7 | X64 | Intel Xeon CPU E5530 2.40GHz |
| Same | 0.96 | debian 11 | X64 | Intel Core i7-7700 CPU 3.60GHz (Kaby Lake) |
| Same | 0.95 | ubuntu 18.04 | X64 | Intel Xeon CPU E5-1650 v4 3.60GHz |
| Same | 0.93 | ubuntu 18.04 | X64 | Intel Core i7-2720QM CPU 2.20GHz (Sandy Bridge) |
| Same | 0.96 | alpine 3.12 | Arm64 | Unknown processor |
| Same | 0.96 | ubuntu 18.04 | Arm64 | Unknown processor |
| Slower | 0.79 | Windows 10 | Arm64 | Microsoft SQ1 3.0 GHz |
| Same | 0.92 | Windows 11 | Arm64 | Microsoft SQ1 3.0 GHz |
| Slower | 0.55 | Windows 10 | X86 | Intel Xeon CPU E5-1650 v4 3.60GHz |
| Same | 1.00 | Windows 11 | X86 | AMD Ryzen Threadripper PRO 3945WX 12-Cores |
| Slower | 0.14 | Windows 11 | X86 | Intel Core i7-10510U CPU 1.80GHz |
| Slower | 0.56 | Windows 7 SP1 | X86 | Intel Core i7-7700 CPU 3.60GHz (Kaby Lake) |
| Same | 1.01 | ubuntu 18.04 | Arm | ARMv7 Processor rev 3 (v7l) |
| Faster | 1.45 | Windows 10 | Arm | Microsoft SQ1 3.0 GHz |
| Same | 0.97 | macOS Monterey 12.2.1 | X64 | Intel Core i7-5557U CPU 3.10GHz (Broadwell) |
| Same | 0.99 | macOS Monterey 12.3.1 | X64 | Intel Core i7-4870HQ CPU 2.50GHz (Haswell) |
category:performance
theme:benchmarks
skill-level:beginner
cost:small
impact:small