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benchmark/misc/getstringwidth.js

@@ -0,0 +1,26 @@
+'use strict';
+
+const common = require('../common.js');
+
+const bench = common.createBenchmark(main, {
+  type: ['ascii', 'mixed', 'emojiseq', 'fullwidth'],
+  n: [10e4],
+}, {
+  flags: ['--expose-internals'],
+});
+
+function main({ n, type }) {
+  const { getStringWidth } = require('internal/util/inspect');
+
+  const str = ({
+    ascii: 'foobar'.repeat(100),
+    mixed: 'foo'.repeat(100) + '😀' + 'bar'.repeat(100),
+    emojiseq: '👨‍👨‍👧‍👦👨‍👩‍👦‍👦👨‍👩‍👧‍👧👩‍👩‍👧‍👦'.repeat(10),
+    fullwidth: '你好'.repeat(150),
+  })[type];
+
+  bench.start();
+  for (let j = 0; j < n; j += 1)
+    getStringWidth(str);
+  bench.end(n);
+}