improve playground runner

Author: dimitropoulos

packages/playground/david-blass-incredibleness.ts

@@ -12,9 +12,9 @@ type sl=s['length']// =>
 
 type c=e['count']// =>
 
-type al=a['activeLocals']  // =>
-type af=a['activeFuncId']  // =>
-type ab=a['activeBranches']// =>
+type al=e['activeLocals']  // =>
+type af=e['activeFuncId']  // =>
+type ab=e['activeBranches']// =>
 
 type ec=e['executionContexts']
 type c0f=ec[0]['funcId']  // =>

packages/playground/evaluate/config.ts

@@ -13,11 +13,26 @@ export const readStringFromMemory = true;
  */
 export const comeUpForAirEvery = 500;
 
-export const initialConditions = {
-  current: 0,
-  stopAt: 1_000_000,
+export interface InitialConditions {
+  /**
+   * the current instruction to start from.
+   * if greater than 0 it will automatically not clear prior results
+   */
+  startAt: 0 | number;
+
+  /** if `Infinity`, the fun never stops.  otherwise it will forcibly halt at a the specified instructions count */
+  stopAt: number;
+
+  /** the number of digits in the filenames and types.  so a value of 4 will yield "0001", "0002", etc. */
+  digits: number;
 }
 
+export const initialConditions = {
+  startAt: 0,
+  stopAt: Infinity, // 1_000_000,
+  digits: 8,
+} satisfies InitialConditions;
+
 export const simpleTypeMode = process.argv.includes('--simple');
 
 const __filename = fileURLToPath(import.meta.url);
@@ -33,7 +48,7 @@ export const bootstrapFilePath = join(resultsDirectory, 'bootstrap.ts');
 export const statsDirectory = join(resultsDirectory, 'stats');
 export const statsPath = join(statsDirectory, 'program-stats.json');
 
-export const formatCurrent = (current: number) => String(current).padStart(6, '0');
+export const formatCurrent = (current: number) => String(current).padStart(initialConditions.digits, '0');
 export const createResultFilePath = (current: number) => join(resultsDirectory, `results-${formatCurrent(current)}.ts`)
 export const statsJsonPath = (current: number) => join(statsDirectory, `stats-${formatCurrent(current)}.json`);
 export const shouldTakeABreath = (timeSpentUnderwater: number, current: number) => current === 0 || timeSpentUnderwater >= comeUpForAirEvery;

packages/playground/evaluate/metering.ts

@@ -0,0 +1,80 @@
+// this is a micro metering library
+
+const metrics = [
+  'getProgram',
+  'getSourceFile',
+  'getTypeAlias',
+  'checker',
+  'getTypeAtLocation',
+  'typeToString',
+  'formatter',
+  'writeResults',
+  'total'
+] as const;
+
+export type Metric = typeof metrics[number];
+
+export type Metering = Record<
+  Metric,
+  number | null
+>;
+
+export type MeteringDefinite = Record<
+  Metric,
+  number
+>;
+
+const metering = metrics.reduce((acc, metric) => ({
+  ...acc,
+  [metric]: null,
+}), {} as Metering);
+
+export const resetMeter = () => {
+  for (const metric in metering) {
+    metering[metric as Metric] = null;
+  }
+}
+
+export const meter = (metric: Metric) => ({
+  start: () => {
+    if (metering[metric] !== null) {
+      throw new Error(`bro.  come on.  metering ${metric} was already started!`);
+    }
+    metering[metric] = performance.now();
+  },
+  stop: () => {
+    const start = metering[metric];
+    if (start === null) {
+      throw new Error(`metering ${metric} was not started.  get your shit together.`);
+    }
+    const result = performance.now() - start;
+    metering[metric] = result;
+    totals[metric] += result;
+  },
+})
+
+export const finalizeMeter = () => {
+  for (const metric in metering) {
+    if (metering[metric as keyof Metering] === null) {
+      throw new Error(`hey dumb dumb.  you forgot to stop measurement for ${metric}`)
+    }
+  }
+  return metering as MeteringDefinite
+}
+
+const totals = metrics.reduce((acc, metric) => ({
+  ...acc,
+  [metric]: 0,
+}), {} as MeteringDefinite);
+
+export const printTotals = () => {
+  console.log(
+    Object.fromEntries(
+      Object.entries(totals).map(([metric, value]) => ([
+        metric,
+        // truncate all the values in totals to 3 decimal points
+        Number(value.toFixed(3))
+      ]))
+    )
+  );
+}