63 lines
2.4 KiB
TypeScript
63 lines
2.4 KiB
TypeScript
import { setupTest, startEngine, startClientInTmux, openCmdFifo, writeFifoCommand, wait, tmuxSendKeys, waitForPaneText, teardownTest } from './test_utils';
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export async function testKeyPressLatency(): Promise<void> {
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console.log("\nTest: KEY PRESS LATENCY (50 toggles, check for exponential slowdown)");
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setupTest();
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const engine = await startEngine();
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await startClientInTmux();
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openCmdFifo();
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await wait(500);
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const ITERATIONS = 50;
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const LATENCY_WARN = 500; // warn if >500ms
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const LATENCY_FAIL = 5000; // fail if >5s
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let latencies: number[] = [];
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let prevState = "IDLE";
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for (let i = 0; i < ITERATIONS; i++) {
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// Determine which state we expect after toggle
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const expectNext = (prevState === "IDLE") ? "R" : "L";
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const startTime = Date.now();
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tmuxSendKeys("looper", "0", "t");
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const pane = await waitForPaneText(expectNext, 10000);
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const elapsed = Date.now() - startTime;
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latencies.push(elapsed);
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// Log periodic summary
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if (i % 10 === 9) {
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const avg = latencies.slice(i-9, i+1).reduce((a,b)=>a+b,0) / 10;
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console.log(` Iteration ${i+1}: avg last 10 = ${avg.toFixed(0)} ms, last = ${elapsed} ms`);
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}
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if (elapsed > LATENCY_FAIL) {
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console.log(` FAIL: Iteration ${i+1} latency ${elapsed} ms exceeds ${LATENCY_FAIL} ms`);
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engine.kill(); teardownTest();
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throw new Error(`Latency exceeded fail threshold at iteration ${i+1}`);
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}
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if (elapsed > LATENCY_WARN) {
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console.log(` WARN: Iteration ${i+1} latency ${elapsed} ms > ${LATENCY_WARN} ms (possible slowdown)`);
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}
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// Toggle state for next expectation
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prevState = (prevState === "IDLE") ? "LOOPING" : "IDLE";
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await wait(200); // brief cooldown
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}
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// Check for trend: if last 10 avg > 3x first 10 avg → exponential
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const first10Avg = latencies.slice(0,10).reduce((a,b)=>a+b,0) / 10;
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const last10Avg = latencies.slice(-10).reduce((a,b)=>a+b,0) / 10;
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console.log(` First 10 avg: ${first10Avg.toFixed(0)} ms, Last 10 avg: ${last10Avg.toFixed(0)} ms`);
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if (last10Avg > 3 * first10Avg && last10Avg > 500) {
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console.log(` FAIL: Latency grew from ${first10Avg.toFixed(0)} ms to ${last10Avg.toFixed(0)} ms (exponential pattern)`);
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engine.kill(); teardownTest();
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throw new Error("Exponential latency increase");
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}
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console.log(" PASS: No exponential latency growth");
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engine.kill();
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teardownTest();
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}
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