# Performance wx.getPerformance()
Start from base library version 2.11.0. Please remaining backward compatible.
with Promise style call: Not supported
Mini Program plugin: Support
Gets information about the performance of the current Mini Program. For more on Mini Programs startup performance optimization, seeBoot Performance Guide。
# Return value
# Performance
The following types of performance metrics are currently supported:
| Indicator Type (entryType) | Indicator name |
|---|---|
| Routing (navigation) | route: Routing performanceappLaunch: Mini Program startup time |
| Render (render) | firstRender: First rendering of the page is time-consuming |
| Script (script) | evaluateScript: Injection script time-consuming |
Performance data details:
| attribute | Introductions |
|---|---|
| entryType | Indicator type |
| name | Indicator name |
| startTime | Index Call Start TimeApp Launch is the time to click the icon |
| duration | time-consuming |
| path | Route |
| navigationStart | True Routing Response Start Time |
| navigationType | Route Detail Type |
# sample code
const performance = wx.getPerformance()
const observer = performance.createObserver((entryList) => {
console.log(entryList.getEntries())
})
observer.observe({ entryTypes: ['render', 'script'] })
# Be careful
Currently, when the code is turned on On-demand injection When,evaluateScript The time to inject code that contains only the public parts, pages, and components is reflected in firstRender Because the code injection process for pages and components becomes part of the first rendering processTherefore, it is normal for script time to decrease and render time to increase after on-demand injection. The optimization effect can focus on overall startup time (appLaunch) to evaluate