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-rw-r--r--ext/mixed/js/timer.js96
1 files changed, 96 insertions, 0 deletions
diff --git a/ext/mixed/js/timer.js b/ext/mixed/js/timer.js
new file mode 100644
index 00000000..87ab62a7
--- /dev/null
+++ b/ext/mixed/js/timer.js
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2019 Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+class Timer {
+ constructor(name) {
+ this.samples = [];
+ this.parent = null;
+
+ this.sample(name);
+ const current = Timer._current;
+ if (current !== null) {
+ current.samples[current.samples.length - 1].children.push(this);
+ this.parent = current;
+ }
+ Timer._current = this;
+ }
+
+ sample(name) {
+ const time = window.performance.now();
+ this.samples.push({
+ name,
+ time,
+ children: []
+ });
+ }
+
+ complete(skip) {
+ this.sample('complete');
+
+ Timer._current = this.parent;
+ if (this.parent === null) {
+ if (!skip) {
+ console.log(this.toString());
+ }
+ } else {
+ if (skip) {
+ const sample = this.parent.samples[this.parent.samples.length - 1];
+ sample.children.splice(sample.children.length - 1, 1);
+ }
+ }
+ }
+
+ duration(sampleIndex) {
+ const sampleIndexIsValid = (typeof sampleIndex === 'number');
+ const startIndex = (sampleIndexIsValid ? sampleIndex : 0);
+ const endIndex = (sampleIndexIsValid ? sampleIndex + 1 : this.times.length - 1);
+ return (this.times[endIndex].time - this.times[startIndex].time);
+ }
+
+ toString() {
+ const indent = ' ';
+ const name = this.samples[0].name;
+ const duration = this.samples[this.samples.length - 1].time - this.samples[0].time;
+ const extensionName = chrome.runtime.getManifest().name;
+ return `${name} took ${duration.toFixed(8)}ms [${extensionName}]` + Timer._indentString(this.getSampleString(), indent);
+ }
+
+ getSampleString() {
+ const indent = ' ';
+ const duration = this.samples[this.samples.length - 1].time - this.samples[0].time;
+ let message = '';
+
+ for (let i = 0, ii = this.samples.length - 1; i < ii; ++i) {
+ const sample = this.samples[i];
+ const sampleDuration = this.samples[i + 1].time - sample.time;
+ message += `\nSample[${i}] took ${sampleDuration.toFixed(8)}ms (${((sampleDuration / duration) * 100.0).toFixed(1)}%) [${sample.name}]`;
+ for (const child of sample.children) {
+ message += Timer._indentString(child.getSampleString(), indent);
+ }
+ }
+
+ return message;
+ }
+
+ static _indentString(message, indent) {
+ return message.replace(/\n/g, `\n${indent}`);
+ }
+}
+
+Timer._current = null;