refactor: excalidraw-app/

1 files changed, 135 insertions, 0 deletions

diff --git a/excalidraw-app/debug.ts b/excalidraw-app/debug.ts
new file mode 100644
index 0000000..38ba805
--- /dev/null
+++ b/excalidraw-app/debug.ts
@@ -0,0 +1,135 @@
+declare global {
+  interface Window {
+    debug: typeof Debug;
+  }
+}
+
+const lessPrecise = (num: number, precision = 5) =>
+  parseFloat(num.toPrecision(precision));
+
+const getAvgFrameTime = (times: number[]) =>
+  lessPrecise(times.reduce((a, b) => a + b) / times.length);
+
+const getFps = (frametime: number) => lessPrecise(1000 / frametime);
+
+export class Debug {
+  public static DEBUG_LOG_TIMES = true;
+
+  private static TIMES_AGGR: Record<string, { t: number; times: number[] }> =
+    {};
+  private static TIMES_AVG: Record<
+    string,
+    { t: number; times: number[]; avg: number | null }
+  > = {};
+  private static LAST_DEBUG_LOG_CALL = 0;
+  private static DEBUG_LOG_INTERVAL_ID: null | number = null;
+
+  private static setupInterval = () => {
+    if (Debug.DEBUG_LOG_INTERVAL_ID === null) {
+      console.info("%c(starting perf recording)", "color: lime");
+      Debug.DEBUG_LOG_INTERVAL_ID = window.setInterval(Debug.debugLogger, 1000);
+    }
+    Debug.LAST_DEBUG_LOG_CALL = Date.now();
+  };
+
+  private static debugLogger = () => {
+    if (
+      Date.now() - Debug.LAST_DEBUG_LOG_CALL > 600 &&
+      Debug.DEBUG_LOG_INTERVAL_ID !== null
+    ) {
+      window.clearInterval(Debug.DEBUG_LOG_INTERVAL_ID);
+      Debug.DEBUG_LOG_INTERVAL_ID = null;
+      for (const [name, { avg }] of Object.entries(Debug.TIMES_AVG)) {
+        if (avg != null) {
+          console.info(
+            `%c${name} run avg: ${avg}ms (${getFps(avg)} fps)`,
+            "color: blue",
+          );
+        }
+      }
+      console.info("%c(stopping perf recording)", "color: red");
+      Debug.TIMES_AGGR = {};
+      Debug.TIMES_AVG = {};
+      return;
+    }
+    if (Debug.DEBUG_LOG_TIMES) {
+      for (const [name, { t, times }] of Object.entries(Debug.TIMES_AGGR)) {
+        if (times.length) {
+          console.info(
+            name,
+            lessPrecise(times.reduce((a, b) => a + b)),
+            times.sort((a, b) => a - b).map((x) => lessPrecise(x)),
+          );
+          Debug.TIMES_AGGR[name] = { t, times: [] };
+        }
+      }
+      for (const [name, { t, times, avg }] of Object.entries(Debug.TIMES_AVG)) {
+        if (times.length) {
+          const avgFrameTime = getAvgFrameTime(times);
+          console.info(name, `${avgFrameTime}ms (${getFps(avgFrameTime)} fps)`);
+          Debug.TIMES_AVG[name] = {
+            t,
+            times: [],
+            avg:
+              avg != null ? getAvgFrameTime([avg, avgFrameTime]) : avgFrameTime,
+          };
+        }
+      }
+    }
+  };
+
+  public static logTime = (time?: number, name = "default") => {
+    Debug.setupInterval();
+    const now = performance.now();
+    const { t, times } = (Debug.TIMES_AGGR[name] = Debug.TIMES_AGGR[name] || {
+      t: 0,
+      times: [],
+    });
+    if (t) {
+      times.push(time != null ? time : now - t);
+    }
+    Debug.TIMES_AGGR[name].t = now;
+  };
+  public static logTimeAverage = (time?: number, name = "default") => {
+    Debug.setupInterval();
+    const now = performance.now();
+    const { t, times } = (Debug.TIMES_AVG[name] = Debug.TIMES_AVG[name] || {
+      t: 0,
+      times: [],
+    });
+    if (t) {
+      times.push(time != null ? time : now - t);
+    }
+    Debug.TIMES_AVG[name].t = now;
+  };
+
+  private static logWrapper =
+    (type: "logTime" | "logTimeAverage") =>
+    <T extends any[], R>(fn: (...args: T) => R, name = "default") => {
+      return (...args: T) => {
+        const t0 = performance.now();
+        const ret = fn(...args);
+        Debug.logTime(performance.now() - t0, name);
+        return ret;
+      };
+    };
+
+  public static logTimeWrap = Debug.logWrapper("logTime");
+  public static logTimeAverageWrap = Debug.logWrapper("logTimeAverage");
+
+  public static perfWrap = <T extends any[], R>(
+    fn: (...args: T) => R,
+    name = "default",
+  ) => {
+    return (...args: T) => {
+      // eslint-disable-next-line no-console
+      console.time(name);
+      const ret = fn(...args);
+      // eslint-disable-next-line no-console
+      console.timeEnd(name);
+      return ret;
+    };
+  };
+}
+//@ts-ignore
+window.debug = Debug;