Faster TS field inverse

src/examples/utils/tic-toc.node.ts

@@ -1,21 +1,21 @@
 /**
  * Helper for printing timings, in the spirit of Python's `tic` and `toc`.
  *
- * This is a slightly nicer version of './tic-tic.ts' which only works in Node.
+ * This is a slightly nicer version of './tic-toc.ts' which only works in Node.
  */
 
 export { tic, toc };
 
-let timingStack: [string, number][] = [];
-let i = 0;
+let timingStack: [string | undefined, number][] = [];
 
-function tic(label = `Run command ${i++}`) {
-  process.stdout.write(`${label}... `);
+function tic(label?: string) {
+  if (label) process.stdout.write(`${label}... `);
   timingStack.push([label, performance.now()]);
 }
 
 function toc() {
   let [label, start] = timingStack.pop()!;
   let time = (performance.now() - start) / 1000;
-  process.stdout.write(`\r${label}... ${time.toFixed(3)} sec\n`);
+  if (label) process.stdout.write(`\r${label}... ${time.toFixed(3)} sec\n`);
+  return time;
 }

src/examples/utils/tic-toc.ts

@@ -4,17 +4,17 @@
 
 export { tic, toc };
 
-let timingStack: [string, number][] = [];
+let timingStack: [string | undefined, number][] = [];
 let i = 0;
 
-function tic(label = `Run command ${i++}`) {
-  console.log(`${label}... `);
+function tic(label?: string) {
+  if (label) console.log(`${label}... `);
   timingStack.push([label, performance.now()]);
 }
 
 function toc() {
   let [label, start] = timingStack.pop()!;
   let time = (performance.now() - start) / 1000;
-  console.log(`\r${label}... ${time.toFixed(3)} sec\n`);
+  if (label) console.log(`${label}... ${time.toFixed(3)} sec`);
   return time;
 }

src/lib/util/assert.ts

@@ -0,0 +1,7 @@
+export { assert };
+
+function assert(stmt: boolean, message?: string): asserts stmt {
+  if (!stmt) {
+    throw Error(message ?? 'Assertion failed');
+  }
+}