[GitHub] [airflow] bbovenzi opened a new pull request #22161: Reduce rerendering of DagRunBar

[GitBox]

bbovenzi opened a new pull request #22161:
URL: https://github.com/apache/airflow/pull/22161


   Use `React.memo` and a custom equality function to eliminate unnecessary 
rerenders of the `DagRunBar` component
   
   DagRunBar is the individual bar of the duration chart at the top of the Grid 
view (my local scheduler is broken):
   <img width="211" alt="Screen Shot 2022-03-10 at 2 03 36 PM" 
src="https://user-images.githubusercontent.com/4600967/157736335-75c16ce8-f630-47ea-bd7f-2451656fe765.png";>
   
   Below is a debug console.log while autorefreshing a run of 
`example_task_group`.
   5 turns to 8 initial renders is because there were more runs.
   Subsequent renders are from the active dag run bar updating with new data.
   Before | After
   ---|---
   <img width="392" alt="Screen Shot 2022-03-10 at 1 32 43 PM" 
src="https://user-images.githubusercontent.com/4600967/157736414-0fd306fc-9379-47b5-956a-302bd5d5f672.png";>
 | <img width="211" alt="Screen Shot 2022-03-10 at 1 50 32 PM" 
src="https://user-images.githubusercontent.com/4600967/157736425-26521062-ff59-40a4-8bda-307208a40dac.png";>
   
   ---
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