asmhatreandClaude Sonnet 5.5
df13a904d7
Spring Boot 4.1.1 harness measuring first-response time versus initial heap size and a 20,000-request warmup. Shows -XX:+ZAdaptiveHeapSizing is not yet in any build. Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01WzVQ6zFh9cuLPj9RSbRH8U
33 lines
1.3 KiB
Bash
Executable File
33 lines
1.3 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Usage: startup.sh <java-home> <label> <runs> [jvm args...]
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# Starts the Spring Boot jar, polls /hello until HTTP 200, and prints wall-clock ms from
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# process start to first response plus the committed heap one second later. One line per run,
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# then a summary line (min / median / max).
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set -u
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JH=$1; LABEL=$2; RUNS=$3; shift 3
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JAR="$(dirname "$0")/../target/jdk28-zgc-1.0.0.jar"
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PORT=${PORT:-18080}
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times=()
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for r in $(seq 1 "$RUNS"); do
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t0=$(date +%s%N)
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"$JH/bin/java" "$@" -jar "$JAR" --server.port=$PORT --spring.main.banner-mode=off \
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--logging.level.root=WARN > /dev/null 2>&1 &
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PID=$!
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while :; do
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code=$(curl -s -o /dev/null -m 1 -w '%{http_code}' "localhost:$PORT/hello")
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[ "$code" = 200 ] && break
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kill -0 $PID 2>/dev/null || { echo "$LABEL run $r: JVM exited early"; break; }
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sleep 0.02
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done
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t1=$(date +%s%N)
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ms=$(( (t1 - t0) / 1000000 ))
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sleep 1
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committed=$(curl -s "localhost:$PORT/heap" | sed -n 's/.*"committedMiB":\([0-9]*\).*/\1/p')
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echo "$LABEL run $r: first-response ${ms} ms, committed heap ${committed} MiB"
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times+=("$ms")
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kill $PID 2>/dev/null; wait $PID 2>/dev/null
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done
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sorted=($(printf '%s\n' "${times[@]}" | sort -n))
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n=${#sorted[@]}
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echo "$LABEL SUMMARY: min ${sorted[0]} ms, median ${sorted[$((n/2))]} ms, max ${sorted[$((n-1))]} ms (n=$n)"
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