Noticed in profiles that invoking *VoteSignBytes always created a
bytes.Buffer, then discarded it inside protoio.MarshalDelimited.
I dug further and examined the call paths and noticed that we
unconditionally create the bytes.Buffer, even though we might
have proto messages (in the common case) that implement
MarshalTo([]byte), and invoked varintWriter. Instead by inlining
this case, we skip a bunch of allocations and CPU cycles,
which then reflects properly on all calling functions. Here
are the benchmark results:
```shell
$ benchstat before.txt after.txt
name old time/op new time/op delta
types.VoteSignBytes-8 705ns ± 3% 573ns ± 6% -18.74% (p=0.000 n=18+20)
types.CommitVoteSignBytes-8 8.15µs ± 9% 6.81µs ± 4% -16.51% (p=0.000 n=20+19)
protoio.MarshalDelimitedWithMarshalTo-8 788ns ± 8% 772ns ± 3% -2.01% (p=0.050 n=20+20)
protoio.MarshalDelimitedNoMarshalTo-8 989ns ± 4% 845ns ± 2% -14.51% (p=0.000 n=20+18)
name old alloc/op new alloc/op delta
types.VoteSignBytes-8 792B ± 0% 600B ± 0% -24.24% (p=0.000 n=20+20)
types.CommitVoteSignBytes-8 9.52kB ± 0% 7.60kB ± 0% -20.17% (p=0.000 n=20+20)
protoio.MarshalDelimitedNoMarshalTo-8 808B ± 0% 440B ± 0% -45.54% (p=0.000 n=20+20)
name old allocs/op new allocs/op delta
types.VoteSignBytes-8 13.0 ± 0% 10.0 ± 0% -23.08% (p=0.000 n=20+20)
types.CommitVoteSignBytes-8 140 ± 0% 110 ± 0% -21.43% (p=0.000 n=20+20)
protoio.MarshalDelimitedNoMarshalTo-8 10.0 ± 0% 7.0 ± 0% -30.00% (p=0.000 n=20+20)
```
Thanks to Tharsis who tasked me to help them increase TPS and who
are keen on improving Tendermint and efficiency.
Updates #7156, and a follow-up to #7070.
Event subscriptions in Tendermint currently use a fixed-length Go
channel as a queue. When the channel fills up, the publisher
immediately terminates the subscription. This prevents slow
subscribers from creating memory pressure on the node by not
servicing their queue fast enough.
Replace the buffered channel used to deliver events to buffered
subscribers with an explicit queue. The queue provides a soft
quota and burst credit mechanism: Clients that usually keep up
can survive occasional bursts, without allowing truly slow
clients to hog resources indefinitely.
I saw one of these tests fail and it looks like it was using code that
wasn't being called anywhere, so I deleted it, and avoided the package
name aliasing.
Adds a simple property test to the `clist` package. This test uses the [rapid](https://github.com/flyingmutant/rapid) library and works by modeling the internal clist as a simple array.
Follow up from this mornings workshop with the Regen team.
## Description
Internalize some libs. This reduces the amount ot public API tendermint is supporting. The moved libraries are mainly ones that are used within Tendermint-core.
