Commits on Sep 4, 2020

1. Decrease expiration time of input updates …

   Changes the expiration time of input updates from 1000ms to 250ms, to
   match the corresponding constant in Scheduler.js.
   
   When we made it larger, a product metric in www regressed, suggesting
   there's a user interaction that's being starved by a series of
   synchronous updates. If that theory is correct, the proper solution is
   to fix the starvation. However, this scenario supports the idea that
   expiration times are an important safeguard when starvation does happen.
   
   Also note that, in the case of user input specifically, this will soon
   no longer be an issue because we plan to make user input synchronous by
   default (until you enter `startTransition`, of course.)
   
   If weren't planning to make these updates synchronous soon anyway, I
   would probably make this number a configurable parameter.

   

   acdlite committed Sep 4, 2020
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