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>> Are these programs benchmarking typical idiomatic Java https://benchmarksgame-team.pages.debian.net/benchmarksgame/fastest/csharp.html https://benchmarksgam

>> Are these programs benchmarking typical idiomatic Java https://benchmarksgame-team.pages.debian.net/benchmarksgame/fastest/csharp.html https://benchmarksgame-team.pages.debian.net/benchmarksgame/... c# regex redux - 1.42 seconds java regex redux - 5.31 seconds Ok... but looking at the code: https://benchmarksgame-team.pages.debian.net/benchmarksgame/program/regexredux-java-3.html https://benchmarksgame-team.pages.debian.net/benchmarksgame/... import java.io.*; import java.util.*; import java.util.concurrent.CompletableFuture; import java.util.Map.Entry; import java.util.function.*; import java.util.regex.*; import static java.util.stream.Collectors.*; ... It's only using vanilla Java features. c# ? ... using System.Runtime.InteropServices; ... Interesting, why does it need that? [DllImport("pcre2-8", EntryPoint = "pcre2_compile_8", CharSet = CharSet.Ansi)] extern static IntPtr PcreCompile(string pattern, long length, uint options, out int errorcode, out long erroroffset, IntPtr ccontext); [DllImport("pcre2-8", EntryPoint = "pcre2_jit_compile_8", CharSet = CharSet.Ansi)] extern static int PcreJitCompile(IntPtr code, uint options); [DllImport("pcre2-8", EntryPoint = "pcre2_jit_match_8", CharSet = CharSet.Ansi)] extern unsafe static int PcreJitMatch(IntPtr code, byte* subject, long length, long startoffset, int options, IntPtr match_data, IntPtr mcontext); [DllImport("pcre2-8", EntryPoint = "pcre2_match_data_create_8", CharSet = CharSet.Ansi)] extern unsafe static IntPtr PcreMatchDataCreate(uint ovecsize, IntPtr mcontext); [DllImport("pcre2-8", EntryPoint = "pcre2_get_error_message_8", CharSet = CharSet.Ansi)] extern unsafe static int PcreGetErrorMessage(int errorcode, StringBuilder buffer, long bufflen); [DllImport("pcre2-8", EntryPoint = "pcre2_get_ovector_pointer_8", CharSet = CharSet.Ansi)] extern unsafe static IntPtr PcreGetOvectorPointer(IntPtr match_data); [DllImport("pcre2-8", EntryPoint = "pcre2_substitute_8", CharSet = CharSet.Ansi)] extern unsafe static int PcreSubstitute(IntPtr code, byte* subject, long length, long startoffset, int options, IntPtr match_data, IntPtr mcontext, byte* replacement, long rlength, byte* outputbuffer, out long outlength); Aha! It's because the c# impl is really just a wrapper round a native C impl of the problem. In what world is this a useful comparison? The fastest "real" c# solution is still faster than the java one though: c# (real) - 3.1 seconds https://benchmarksgame-team.pages.debian.net/benchmarksgame/program/regexredux-csharpcore-5.html https://benchmarksgame-team.pages.debian.net/benchmarksgame/...

zigzag312 5y ago
I agree. That's really not usefull comparision. They should create categories for each benchmark, like: - very naive code (shortest, most readable & easy to write code) - idiomatic code - optimized code without other-language-libs wrappers and without SIMD, single threaded - optimized code without other-language-libs wrappers and without SIMD, multi-threaded - optimized code without other-language-libs wrappers and with SIMD and/or multi-threaded - optimized code with other-language-libs wrappers allowed and any other optimization technique
- igouy 5y ago
  You are free to take the data, create whatever categories you want and publish.
  - whthf_22 5y ago
    How would that undo the unfair comparison done in the benchmark game?
    - igouy 5y ago
      1. Not “unfair”. 2. We wouldn’t look at the benchmarks game if we thought an alternative presentation was more useful.
grumpyprole 5y ago
I agree it's not a useful comparison. That's why I don't give much weight to statements such as "Java comes on top in every individual category of all the benchmarks".
igouy 5y ago
> In what world is this a useful comparison? In this world where we also compare to C++ programs. In this world where — as you acknowledge — we also compare a C# regex-redux program that does not use a third party library. https://benchmarksgame-team.pages.debian.net/benchmarksgame/program/regexredux-csharpcore-5.html https://benchmarksgame-team.pages.debian.net/benchmarksgame/... > Interesting, why does it need that? 2 out of 10 tasks regex-redux and pidigits accept third-party libraries, the other 8 out of 10 tasks do not.

zigzag312 5y ago

I agree. That's really not usefull comparision. They should create categories for each benchmark, like: - very naive code (shortest, most readable & easy to write code) - idiomatic code - optimized code without other-language-libs wrappers and without SIMD, single threaded - optimized code without other-language-libs wrappers and without SIMD, multi-threaded - optimized code without other-language-libs wrappers and with SIMD and/or multi-threaded - optimized code with other-language-libs wrappers allowed and any other optimization technique

igouy 5y ago
You are free to take the data, create whatever categories you want and publish.
- whthf_22 5y ago
  How would that undo the unfair comparison done in the benchmark game?
  - igouy 5y ago
    1. Not “unfair”. 2. We wouldn’t look at the benchmarks game if we thought an alternative presentation was more useful.

grumpyprole 5y ago

I agree it's not a useful comparison. That's why I don't give much weight to statements such as "Java comes on top in every individual category of all the benchmarks".

igouy 5y ago

> In what world is this a useful comparison? In this world where we also compare to C++ programs. In this world where — as you acknowledge — we also compare a C# regex-redux program that does not use a third party library. https://benchmarksgame-team.pages.debian.net/benchmarksgame/program/regexredux-csharpcore-5.html https://benchmarksgame-team.pages.debian.net/benchmarksgame/... > Interesting, why does it need that? 2 out of 10 tasks regex-redux and pidigits accept third-party libraries, the other 8 out of 10 tasks do not.