Use human readable durations

Author: 414owen

src/write.ts

@@ -148,11 +148,52 @@ function floatStr(n: number) {
     return n.toString();
 }
 
+const round = (n: number, places = 3): number => parseFloat(n.toFixed(places));
+
+function strDuration(n: number): string {
+    let unit = 'ns';
+    if (n >= 6e10) {
+        let secs = n / 1e9;
+        const mins = Math.floor(secs / 60);
+        secs %= 60;
+        return `${mins}m ${round(secs)}s`;
+    }
+
+    if (n >= 1e9) {
+        unit = 's';
+        n /= 1e9;
+    } else if (n >= 1e6) {
+        unit = 'ms';
+        n /= 1e6;
+    } else if (n >= 1e3) {
+        unit = 'μs';
+        n /= 1e3;
+    }
+
+    return `${round(n)}${unit}`;
+}
+
+const NS_RANGE_REGEX = /^±\s*([0-9]+)$/;
+
 function strVal(b: BenchmarkResult): string {
-    let s = `\`${b.value}\` ${b.unit}`;
-    if (b.range) {
-        s += ` (\`${b.range}\`)`;
+    let s = '';
+    let range = b.range;
+
+    if (b.unit === 'ns/iter') {
+        s += `\`${strDuration(b.value)}/iter\``;
+        range = range && range.match(NS_RANGE_REGEX) ? 
+            "± " + strDuration(parseInt(range.replace(NS_RANGE_REGEX, "$1"))) :
+            // If we can't show a unit, just give up...
+            range = undefined;
+        }
+    } else {
+        s += `\`${b.value} ${b.unit}\``;
     }
+
+    if (range) {
+        s += `<br>(\`${range}\`)`;
+    }
+
     return s;
 }
 

test/buildComment.test.ts

@@ -111,9 +111,9 @@ describe('buildComment', () => {
             
             | Benchmark suite | Current: testCommitIdCurrent | Previous: testCommitIdPrevious | Ratio |
             |-|-|-|-|
-            | \`TestBench<1>\` | \`0\` testUnit | \`0\` testUnit | \`1\` |
-            | \`TestBench<2>\` | \`1\` testUnit | \`0\` testUnit | \`+∞\` |
-            | \`TestBench<3>\` | \`-1\` testUnit | \`0\` testUnit | \`-∞\` |
+            | \`TestBench<1>\` | \`0 testUnit\` | \`0 testUnit\` | \`1\` |
+            | \`TestBench<2>\` | \`1 testUnit\` | \`0 testUnit\` | \`+∞\` |
+            | \`TestBench<3>\` | \`-1 testUnit\` | \`0 testUnit\` | \`-∞\` |
             
             </details>
             
@@ -197,9 +197,9 @@ describe('buildComment', () => {
             
             | Benchmark suite | Current: testCommitIdCurrent | Previous: testCommitIdPrevious | Ratio |
             |-|-|-|-|
-            | \`TestBench<1>\` | \`0\` testUnit | \`0\` testUnit | \`1\` |
-            | \`TestBench<2>\` | \`0\` testUnit | \`1\` testUnit | \`+∞\` |
-            | \`TestBench<3>\` | \`0\` testUnit | \`-1\` testUnit | \`-∞\` |
+            | \`TestBench<1>\` | \`0 testUnit\` | \`0 testUnit\` | \`1\` |
+            | \`TestBench<2>\` | \`0 testUnit\` | \`1 testUnit\` | \`+∞\` |
+            | \`TestBench<3>\` | \`0 testUnit\` | \`-1 testUnit\` | \`-∞\` |
             
             </details>