Faster trie node encoding updated

[blukat29]

Proposed changes

Continuation of #1679.

• Replace rlp.EncodeToBytes() with concrete node.encode() to avoid type reflection.

Types of changes

• Bugfix
• New feature or enhancement
• Others

Checklist

• I have read the CONTRIBUTING GUIDELINES doc
• I have signed the CLA
• Lint and unit tests pass locally with my changes ($ make test)
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules

Related issues

Further comments

Running time 16% and memalloc 2% decreased.

cd storage/statedb
git checkout dev
go test -v -run=^$ -bench=BenchmarkHashFixedSize -count=7 | tee before.txt
git checkout faster-trie-node-encode
go test -v -run=^$ -bench=BenchmarkHashFixedSize -count=7 | tee after.txt
benchstat before.txt after.txt

goos: darwin
goarch: arm64
pkg: github.com/klaytn/klaytn/storage/statedb
                      │ before.txt  │             after.txt              │
                      │   sec/op    │   sec/op     vs base               │
HashFixedSize/10-10     74.53µ ± 1%   65.24µ ± 3%  -12.47% (p=0.001 n=7)
HashFixedSize/100-10    199.3µ ± 1%   156.8µ ± 3%  -21.33% (p=0.001 n=7)
HashFixedSize/1K-10     1.393m ± 2%   1.206m ± 4%  -13.38% (p=0.001 n=7)
HashFixedSize/10K-10    8.803m ± 1%   7.296m ± 3%  -17.12% (p=0.001 n=7)
HashFixedSize/100K-10   76.55m ± 3%   62.78m ± 5%  -17.99% (p=0.001 n=7)
geomean                 1.694m        1.414m       -16.52%

                      │  before.txt  │              after.txt              │
                      │     B/op     │     B/op      vs base               │
HashFixedSize/10-10     34.83Ki ± 0%   30.86Ki ± 0%  -11.38% (p=0.001 n=7)
HashFixedSize/100-10    168.1Ki ± 0%   149.5Ki ± 0%  -11.08% (p=0.001 n=7)
HashFixedSize/1K-10     1.644Mi ± 0%   1.456Mi ± 0%  -11.44% (p=0.001 n=7)
HashFixedSize/10K-10    17.11Mi ± 0%   15.03Mi ± 0%  -12.12% (p=0.001 n=7)
HashFixedSize/100K-10   169.8Mi ± 0%   149.3Mi ± 0%  -12.07% (p=0.001 n=7)
geomean                 1.928Mi        1.704Mi       -11.62%

                      │ before.txt  │             after.txt             │
                      │  allocs/op  │  allocs/op   vs base              │
HashFixedSize/10-10      630.0 ± 0%    616.0 ± 0%  -2.22% (p=0.001 n=7)
HashFixedSize/100-10    3.079k ± 0%   3.012k ± 0%  -2.18% (p=0.001 n=7)
HashFixedSize/1K-10     30.60k ± 0%   29.91k ± 0%  -2.26% (p=0.001 n=7)
HashFixedSize/10K-10    310.7k ± 0%   303.1k ± 0%  -2.44% (p=0.001 n=7)
HashFixedSize/100K-10   3.102M ± 0%   3.027M ± 0%  -2.41% (p=0.001 n=7)
geomean                 35.60k        34.78k       -2.30%