High CPU Utilization from RPC Node from DatastreamClientRunner

[praetoriansentry]

After upgrading to zkevm branch, the RPC node needs to constantly use a lot of CPU. The pprof CPU looks like this:

I'm seeing this performance on this commit: 434376b

[cffls]

Potential fix: #1389

[V-Staykov]

This should be fixed by this older PR:#1297

And #1389 will be conflicting with it.

Can we merge only the test in a separate PR, so we can check if it passes with the first PR merged?

[cffls]

Nice, thanks @V-Staykov ! I will keep only the test in #1389.

[Sharonbc01]

Update.
Fix to high CPU problem has been merged: #1297

[Sharonbc01]

John confirmed good