1 files changed, 107 insertions, 0 deletions
diff --git a/bench/hot-module-reloading/css-stress-test/read-frames.js b/bench/hot-module-reloading/css-stress-test/read-frames.js
new file mode 100644
index 000000000..ab35c630d
--- /dev/null
+++ b/bench/hot-module-reloading/css-stress-test/read-frames.js
@@ -0,0 +1,107 @@
+const fs = require("fs");
+
+const path = require("path");
+const PROJECT = process.env.PROJECT || "bun";
+const percentile = require("percentile");
+const PACKAGE_NAME = process.env.PACKAGE_NAME;
+const label = `${PACKAGE_NAME}@${
+  require(PACKAGE_NAME + "/package.json").version
+}`;
+
+const BASEFOLDER = path.resolve(PROJECT);
+const OUTFILE = path.join(process.cwd(), process.env.OUTFILE);
+
+const buf = fs.readFileSync(BASEFOLDER + "/colors.css.blob");
+const VALID_TIMES = new BigUint64Array(buf.buffer).subarray(1);
+const cssFileSize = new BigUint64Array(buf.buffer)[0];
+
+const TOTAL_FRAMES = VALID_TIMES.length;
+
+const timings = fs
+  .readFileSync(BASEFOLDER + "/frames.all.clean", "utf8")
+  .split("\n")
+  .map((a) => a.replace(/[Ran:'\.]?/gm, "").trim())
+  .filter((a) => parseInt(a, 10))
+  .filter((a) => a.length > 0 && VALID_TIMES.includes(BigInt(parseInt(a, 10))))
+  .map((num) => BigInt(num));
+
+timings.sort();
+
+const frameTimesCount = timings.length;
+
+var frameTime = new Array(Math.floor(frameTimesCount / 2));
+
+for (let i = 0; i < frameTime.length; i++) {
+  const i1 = i * 2;
+  const i2 = i * 2 + 1;
+
+  frameTime[i] = Math.max(Number(timings[i2] - timings[i1]), 0);
+}
+
+const report = {
+  label,
+  cssFileSize: Number(cssFileSize),
+  at: new Date().toISOString(),
+  sleep: process.env.SLEEP_INTERVAL,
+  package: {
+    name: PACKAGE_NAME,
+    version: require(PACKAGE_NAME + "/package.json").version,
+  },
+  timestamps: timings.map((a) => Number(a)),
+  frameTimes: frameTime,
+  percentileMs: {
+    50: percentile(50, frameTime) / 10,
+    75: percentile(75, frameTime) / 10,
+    90: percentile(90, frameTime) / 10,
+    95: percentile(95, frameTime) / 10,
+    99: percentile(99, frameTime) / 10,
+  },
+};
+
+fs.writeFileSync(
+  path.join(
+    path.dirname(OUTFILE),
+    path.basename(OUTFILE) +
+      "@" +
+      report.package.version +
+      "." +
+      process.env.SLEEP_INTERVAL +
+      "ms." +
+      `${process.platform}-${
+        process.arch === "arm64" ? "aarch64" : process.arch
+      }` +
+      ".json"
+  ),
+  JSON.stringify(report, null, 2)
+);
+
+console.log(
+  label + "\n",
+  "-".repeat(50) + "\n",
+  "CSS HMR FRAME TIME\n" + "\n",
+
+  "50th percentile:",
+  percentile(50, frameTime) / 10 + "ms",
+  "\n",
+  "75th percentile:",
+  percentile(75, frameTime) / 10 + "ms",
+  "\n",
+  "90th percentile:",
+  percentile(90, frameTime) / 10 + "ms",
+  "\n",
+  "95th percentile:",
+  percentile(95, frameTime) / 10 + "ms",
+  "\n",
+  "99th percentile:",
+  percentile(99, frameTime) / 10 + "ms",
+  "\n",
+  "Rendered frames:",
+  timings.length,
+  "/",
+  TOTAL_FRAMES,
+  "(" +
+    Math.round(
+      Math.max(Math.min(1.0, timings.length / TOTAL_FRAMES), 0) * 100
+    ) +
+    "%)"
+);