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test(server): compare profiled and plain config reads on Windows

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This commit is contained in:
paseo-bot[bot]
2026-10-30 12:39:56 +00:00
parent 14329d1b98
commit 306b9bfb7b
2 changed files with 43 additions and 17 deletions
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packages/server/src/utils/paseo-config-file.test.ts
+16 -8
View File
@@ -44,10 +44,14 @@ afterAll(() => {
rmSync(probeDirectory, { recursive: true, force: true });
});
async function measureConfigRead(directory: string) {
const { stdout, stderr } = await promisify(execFile)(process.execPath, [probePath, directory], {
timeout: 15_000,
});
async function measureConfigRead(directory: string, profile = false) {
const { stdout, stderr } = await promisify(execFile)(
process.execPath,
[probePath, directory, profile ? "profile" : "plain"],
{
timeout: 15_000,
},
);
process.stderr.write(stderr);
return JSON.parse(stdout) as {
result: Awaited<ReturnType<typeof readPaseoConfigForEdit>>;
@@ -133,9 +137,13 @@ describe("paseo config file substrate", () => {
expect(blockingMs).toBeLessThan(20);
});
it.each(Array.from({ length: 30 }, (_, i) => i))(
"keeps main-thread work below 20ms while admitting large configs (%i)",
async () => {
it.each(
Array.from({ length: 150 }, (_, repetition) =>
[false, true].map((profile) => ({ repetition, profile })),
).flat(),
)(
"keeps main-thread work below 20ms while admitting large configs (repetition=$repetition, profile=$profile)",
async ({ profile }) => {
const config = {
scripts: Object.fromEntries(
Array.from({ length: 7_000 }, (_, i) => [`script${i}`, { command: "echo hi" }]),
@@ -144,7 +152,7 @@ describe("paseo config file substrate", () => {
};
await writeFile(join(tempDir, "paseo.json"), JSON.stringify(config));
const { result, blockingMs, filesystemRequests, yields, workerMessages } =
await measureConfigRead(tempDir);
await measureConfigRead(tempDir, profile);
expect(result).toEqual({ ok: true, config, revision: await statPaseoConfigPath(tempDir) });
expect(blockingMs).toBeLessThan(20);
expect(filesystemRequests).toBeGreaterThan(0);
packages/server/src/utils/test-fixtures/config-responsiveness.ts
+27 -9
View File
@@ -18,19 +18,26 @@ const activity = createHook({
if (executionAsyncResource() instanceof MessagePort) workerMessages++;
},
}).enable();
const profiler = new Session();
profiler.connect();
await profiler.post("Profiler.enable");
await profiler.post("Profiler.setSamplingInterval", { interval: 100 });
await profiler.post("Profiler.start");
const profiler = process.argv[3] === "profile" ? new Session() : null;
if (profiler) {
profiler.connect();
await profiler.post("Profiler.enable");
await profiler.post("Profiler.setSamplingInterval", { interval: 100 });
await profiler.post("Profiler.start");
}
const measured = await measureMainThreadWork("project config main-thread work", () =>
readPaseoConfigForEdit(directory),
);
activity.disable();
const { profile } = await profiler.post("Profiler.stop");
profiler.disconnect();
if (measured.blockingMs >= 20) {
process.stderr.write(`Config profiling: ${Boolean(profiler)}\n`);
const profile = profiler ? (await profiler.post("Profiler.stop")).profile : null;
profiler?.disconnect();
if (profile && measured.blockingMs >= 20) {
const nodes = new Map(profile.nodes.map((node) => [node.id, node]));
const parents = new Map<number, number>();
for (const node of profile.nodes) {
for (const child of node.children ?? []) parents.set(child, node.id);
}
const samples = new Map<number, number>();
for (const [index, id] of (profile.samples ?? []).entries()) {
samples.set(id, (samples.get(id) ?? 0) + (profile.timeDeltas?.[index] ?? 0));
@@ -40,7 +47,18 @@ if (measured.blockingMs >= 20) {
.slice(0, 20)
.map(([id, micros]) => {
const frame = nodes.get(id)!.callFrame;
return { function: frame.functionName, line: frame.lineNumber, milliseconds: micros / 1000 };
const callers: string[] = [];
let parent = parents.get(id);
while (parent !== undefined && callers.length < 5) {
callers.push(nodes.get(parent)!.callFrame.functionName);
parent = parents.get(parent);
}
return {
function: frame.functionName,
callers,
line: frame.lineNumber,
milliseconds: micros / 1000,
};
});
process.stderr.write(`Config CPU diagnostic: ${JSON.stringify(hottest)}\n`);
}