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‎.gitignore

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/node_modules/
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/.wireit/
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/benchmarks/**/*.js
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/benchmarks/**/*.js.map
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/benchmarks/**/*.d.ts
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/benchmarks/**/*.d.ts.map

‎LICENSE

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BSD 3-Clause License
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Copyright (c) 2023 Google LLC. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

‎README.md

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# platform-benchmarks
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# Lit platform benchmarks
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This repo contains a set of micro-benchmarks of basic platform APIs.
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The benchmarks are useful to measure the performance fundamental operations across different DOM and JavaScript techniques and different browsers.
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## Benchmarks
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### dirty-check-attributes
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This benchmark measures the performance impact of dirty-checking values before calling `setAttribute()``.
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It measures three techniques:
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- always call `setAttribute()`` (no dirty-check)
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- dirty check against the DOM (with `getAttribute()`)
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- dirty check against a stored JS value
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```sh
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npm run bench:dirty-check-attributes
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```
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### dirty-check-text-content
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This benchmark measures the performance impact of dirty-checking values
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before setting `Text.textContent`.
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It measures three techniques:
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- always call `textContent` (no dirty-check)
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- dirty check against the DOM
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- dirty check against a stored JS value
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## Future benchmarks
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- Setting `.textContent` vs `.data`
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- `append()` vs `insertBefore()`
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- `template.innerHTML` vs `DOMParser`
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- template clone vs imperative DOM construction
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- Reusing TreeWalkers
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- Finding nodes with TreeWalker + comments vs query selectors, etc
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‎benchmarks/dirty-check-attributes/index.html

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<!doctype html>
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<html>
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<script type="module" src="./index.js"></script>
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</html>

‎benchmarks/dirty-check-attributes/tachometer.json

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{
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"$schema": "https://raw.githubusercontent.com/Polymer/tachometer/master/config.schema.json",
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"sampleSize": 50,
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"timeout": 3,
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"benchmarks": [
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{
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"measurement": {
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"mode": "performance",
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"entryName": "result"
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},
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"expand": [
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{
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"name": "always-set",
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"url": "./index.html?benchmark=always-set",
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"expand": [
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{
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"browser": "chrome"
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},
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{
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"browser": "safari"
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},
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{
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"browser": "firefox"
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}
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]
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},
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{
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"name": "check-set",
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"url": "./index.html?benchmark=check-set",
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"expand": [
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{
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"browser": "chrome"
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},
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{
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"browser": "safari"
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},
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{
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"browser": "firefox"
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}
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]
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},
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{
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"name": "dirty-check",
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"url": "./index.html?benchmark=dirty-check",
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"expand": [
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{
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"browser": "chrome"
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},
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{
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"browser": "safari"
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},
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{
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"browser": "firefox"
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}
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]
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}
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]
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}
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]
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}

‎benchmarks/dirty-check-text-content/index.html

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<!doctype html>
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<html>
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<script type="module" src="./index.js"></script>
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</html>

‎benchmarks/dirty-check-text-content/tachometer.json

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{
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"$schema": "https://raw.githubusercontent.com/Polymer/tachometer/master/config.schema.json",
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"sampleSize": 50,
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"timeout": 3,
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"benchmarks": [
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{
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"measurement": {
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"mode": "performance",
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"entryName": "result"
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},
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"expand": [
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{
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"name": "always-set",
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"url": "./index.html?benchmark=always-set",
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"expand": [
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{
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"browser": "chrome"
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},
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{
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"browser": "safari"
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},
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{
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"browser": "firefox"
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}
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]
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},
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{
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"name": "check-set",
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"url": "./index.html?benchmark=check-set",
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"expand": [
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{
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"browser": "chrome"
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},
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{
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"browser": "safari"
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},
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{
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"browser": "firefox"
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}
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]
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},
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{
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"name": "dirty-check",
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"url": "./index.html?benchmark=dirty-check",
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"expand": [
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{
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"browser": "chrome"
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},
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{
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"browser": "safari"
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},
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{
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"browser": "firefox"
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}
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]
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}
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]
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}
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]
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}

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