feat: profiling setup

packages/core/profiling/jamie.ts

@@ -0,0 +1,37 @@
+class Profiler {
+	private map: Record<string, number> = {};
+
+	profile<T>(key: string, action: () => T) {
+		const start = global.isIOS ? (global as any).performance.now() : __time();
+		const returnValue = action();
+		const stop = global.isIOS ? (global as any).performance.now() : __time();
+		const period = stop - start;
+
+		this.map[key] = (this.map[key] || 0) + period;
+
+		// console.log(`[PROFILE] ${key}: ${stop - start} ms`);
+		return returnValue;
+	}
+
+	flush() {
+		const map = this.map;
+		this.map = {};
+		return map;
+	}
+
+	get(key: string) {
+		return this.map[key];
+	}
+
+	report(map: Record<string, number> = this.map) {
+		return Object.entries(map).sort(([, valueA], [, valueB]) => {
+			return sortDescending(valueA, valueB);
+		});
+	}
+}
+
+function sortDescending(a: number, b: number): 1 | 0 | -1 {
+	return a < b ? 1 : a > b ? -1 : 0;
+}
+
+export const jamieProfiler = new Profiler();