CPU spinning + browser unresponsiveness on network switch

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.

[ricmoo]

Glad to hear it! 😃

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

Thanks! 😃

[kerzhner]

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!