asmhatreandClaude Sonnet 5.5
d565be93c6
Live heap, throughput, p99 and startup across four configurations, including opt-in and opt-out of compact object headers. Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01WzVQ6zFh9cuLPj9RSbRH8U
43 lines
2.2 KiB
Java
43 lines
2.2 KiB
Java
import java.net.URI;
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import java.net.http.*;
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import java.util.*;
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import java.util.concurrent.*;
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import java.util.concurrent.atomic.*;
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/** Closed-loop load: THREADS threads, WARMUP seconds discarded, then MEASURE seconds recorded. */
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public class Load {
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public static void main(String[] a) throws Exception {
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int port = Integer.parseInt(a[0]), warmup = Integer.parseInt(a[1]), measure = Integer.parseInt(a[2]), threads = Integer.parseInt(a[3]);
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HttpClient c = HttpClient.newBuilder().version(HttpClient.Version.HTTP_1_1).build();
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HttpRequest rq = HttpRequest.newBuilder(URI.create("http://localhost:" + port + "/quote?n=200")).build();
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long start = System.nanoTime();
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long measureFrom = start + warmup * 1_000_000_000L, end = measureFrom + measure * 1_000_000_000L;
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List<long[]> perThread = new CopyOnWriteArrayList<>();
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ExecutorService ex = Executors.newFixedThreadPool(threads);
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List<Future<?>> fs = new ArrayList<>();
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for (int t = 0; t < threads; t++) fs.add(ex.submit(() -> {
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long[] buf = new long[2_000_000]; int n = 0;
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try {
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while (true) {
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long s = System.nanoTime();
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if (s >= end) break;
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c.send(rq, HttpResponse.BodyHandlers.discarding());
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long e = System.nanoTime();
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if (s >= measureFrom && n < buf.length) buf[n++] = e - s;
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}
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} catch (Exception e) { throw new RuntimeException(e); }
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perThread.add(Arrays.copyOf(buf, n));
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return null;
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}));
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for (Future<?> f : fs) f.get();
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ex.shutdown();
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long total = 0; for (long[] b : perThread) total += b.length;
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long[] all = new long[(int) total]; int p = 0;
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for (long[] b : perThread) { System.arraycopy(b, 0, all, p, b.length); p += b.length; }
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Arrays.sort(all);
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System.out.printf("requests=%d throughput=%.0f req/s p50=%.2f ms p99=%.2f ms p99.9=%.2f ms max=%.2f ms%n",
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total, total / (double) measure, all[(int) (total * 0.50)] / 1e6, all[(int) (total * 0.99)] / 1e6,
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all[(int) (total * 0.999)] / 1e6, all[(int) total - 1] / 1e6);
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}
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}
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