asmhatreandClaude Sonnet 5.5
0457cf4bfb
Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_017ic4b4VQVEJWetTT1dYzyJ
26 lines
1.2 KiB
Bash
Executable File
26 lines
1.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Short JMH run: INDICATIVE only. One fork, 3 x 1s warmup, 5 x 2s measurement per cell.
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# On a shared 2-vCPU sandbox the absolute numbers move 10-30% between runs; read the ORDER and
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# the SHAPE (who collapses with more threads), not the third digit.
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set -euo pipefail
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cd "$(dirname "$0")/.."
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mkdir -p output
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mvn -B -q -T1 compile
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mvn -B -q dependency:build-classpath -Dmdep.outputFile=target/cp.txt
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CP="target/classes:$(cat target/cp.txt)"
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J="java -cp $CP org.openjdk.jmh.Main LruBenchmark -f 1 -wi 3 -w 1 -i 5 -r 2 -tu us"
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{
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echo "JMH 1.37 / $(java -version 2>&1 | grep -v Picked | head -1)"
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echo "cores=$(nproc) loadavg-at-start=$(cut -d' ' -f1-3 /proc/loadavg) (shared sandbox: INDICATIVE)"
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echo "workload: get; on miss put. Keys uniform over 2048, capacity 1024. ops/microsecond, higher is better."
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echo
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echo "### 1 thread, all implementations"
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$J -t 1 2>&1 | grep -E '^LruBenchmark|^Benchmark'
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for t in 2 4; do
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echo
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echo "### $t threads, thread-safe implementations only"
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$J -t $t -p "impl=synchronizedMap(LinkedHashMap),synchronized,reentrantlock,striped16,striped16-lowbits,caffeine" 2>&1 | grep -E '^LruBenchmark|^Benchmark'
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done
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} > output/10-jmh-indicative.txt
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cat output/10-jmh-indicative.txt
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