MIME-Version: 1.0
From: Anthony Metzidis <anthony.metzidis@gmail.com>
Date: Mon, 6 Apr 2026 12:49:35 -0700
Message-ID: <CADgM4W+aJ_Rq0V4e3yJtj1t1eP+HSb7fo_k36T5OR6CXacCwRg@mail.gmail.com>
Subject: WSL (Windows) Alpine vs Debian Benchmarks -- 340% better scheduler perf
To: ~alpine/users@lists.alpinelinux.org
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While debugging kernel mitigations (mitigations=3Doff kernel param) in
WSL I noticed that Alpine performance for linux scheduler (perf bench
sched pipe ) is 340% better  on the benchmark (141k ops/sec Alpine vs
41k Debian).

Any theories about the variation ? I've tested on a few separate WSL
alpine installs to make sure it's not a fluke.  It increased with the
latest WSL kernel

# uname -v -r
6.6.114.1-microsoft-standard-WSL2 #1 SMP PREEMPT_DYNAMIC Mon Dec  1
20:46:23 UTC 2025

# Alpine 2.6.3     141383 ops/sec
=E2=9D=AF perf bench sched pipe -l 100000
    Total time: 0.707 [sec]

       7.072980 usecs/op
         141383 ops/sec

# Debian 13.4 41145 ops/sec
=E2=9D=AF perf bench sched pipe -l 100000
# Running 'sched/pipe' benchmark:
# Executed 100000 pipe operations between two processes

     Total time: 2.430 [sec]

      24.303820 usecs/op
          41145 ops/sec