# Performance comparison

First screen time is one of the most important measures of rendering performance.Weixin Mini Program first screen time can be measured from the click of the last page to the FCP (First Contentful Paint) of the next page. The quality of first screen performance affects the response speed when the last page is clicked, and the white screen time of the next.

There are already some Weixin Mini Programs] running online in Skyline mode. The following online data from the Mini Program assistant shows that Skyline's first screen time is 66% faster than WebView, and the lower end of the phone's performance the more pronounced the difference.

In terms of memory footprint, because the line Weixin Mini Program failed to obtain more accurate memory data,We collected some measurement data in the local, the method of measurement are measured n times to take the mean, and the use of two indicators, one is to open the example of small procedures home page, set aside 30 seconds after the acquisition of data, the other is to cut Tab page, the same silent data collection.

The measurement data is shown in the figure below (in units of M). It can be seen that a single page of Skyline uses 35% less memory than WebView, and two pages of Skyline use 50% less memory than webView. The memory gap becomes more pronounced as more pages are opened.

Similar to the measurement of memory footprint, the measurement of CPU utilization is shown below (in%), and you can also see that Skyline has a good improvement over WebView.

# Contrast of effects

Here, we recorded the Weixin Mini Program assistant in Skyline and WebView operation video, from the video comparison can be more intuitive to feel the difference.

The video was recorded on an OPPO R17, with Skyline on the left and WebView on the right.