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CPU spinning + browser unresponsiveness on network switch

See original GitHub issue

In our dapp that uses ethers 5.0.0-beta.187 + Metamask + Chrome or Firefox, we are observing the following:

  1. Load the dapp with Metamask pointed to local ganache.
  2. Switch Metamask to Ropsten.
  3. Observe CPU of the tab go to 100%.
  4. Pause script execution in Chrome. The execution pauses on the following in base-provider.js:
for (let i = this._emitted.block + 1; i <= blockNumber; i++) {
  this.emit("block", i);
} // The emitted block was updated, check for obsolete events

One example of values int he loop are this._emitted.block of 54 and blockNumber of 8,012,600. With these values, the loop will iterate 8 million times.

Screen Shot 2020-06-01 at 12 17 15 PM

Issue Analytics

  • State:closed
  • Created 3 years ago
  • Reactions:1
  • Comments:7 (5 by maintainers)

github_iconTop GitHub Comments

ricmoocommented, Jun 5, 2020

Glad to hear it! 😃

Closing now, but reach out if there are any further issues.

Thanks! 😃

kerzhnercommented, Jun 5, 2020

Tried out listening to the network event and triggering a page reload using ethers 5.0.0-beta.191. Works like a charm. Thanks @ricmoo!

Read more comments on GitHub >

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