Polygon blocks polled only every ~15 seconds

[hiroshi-yamamoto-dublr]

Ethers Version

5.7.0

Search Terms

polygon block interval, polygon block samplerate

Describe the Problem

If I watch for new blocks using

provider.on("block", onBlock);

then on Polygon Mumbai, via Alchemy RPC, a chunk of ~5 blocks are delivered together every ~15 seconds. Furthermore, transactions take up to 15 seconds to commit on Mumbai (averaging half of that), when they should take 2-3 seconds to commit (averaging half of that).

It would therefore appear that Ethers (?) is polling for new blocks with the expected interval of Ethereum.

The block interval has dropped to a fixed 12 seconds for Ethereum PoS. But the block interval is 2-3 seconds for Polygon. Therefore blockchain operations have much higher latency than they should on Polygon. On average the user has to wait 6 or more seconds longer than they should have to wait for a Polygon transaction to be committed.

Code Snippet

No response

Contract ABI

No response

Errors

No response

Environment

Other (please specify)

Environment (Other)

Polygon Mumbai

[ricmoo]

Ethers by default polls every 4 seconds, which you can adjust on the provider using provider.pollingInterval = 2000 for example, to set it to 2 seconds.

Keep in mind this will drastically increase your requests to your host, so it they charge you per request costs can go up.

You can also check to make sure the backend is keeping up? During times of congestion, I have seen these networks get bogged down and return out-of-date info.