Thomas Pelletier
390927a0cd
Reuse AST storage between top-level expressions
```
Comparing:
old: v2-wip/1da2fc7 (2021-03-25 20:38:05 -0400 -0400)
run: v2-wip/3f23ab9 (2021-03-25 22:35:06 -0400 -0400)
-----------------------------------------------------------
name old time/op new time/op delta
UnmarshalSimple/v2-8 700ns ± 3% 705ns ± 2% ~ (p=0.690 n=5+5)
UnmarshalSimple/v1-8 3.85µs ± 1% 4.02µs ± 4% +4.19% (p=0.032 n=5+5)
UnmarshalSimple/bs-8 2.34µs ± 2% 2.38µs ± 3% ~ (p=0.310 n=5+5)
ReferenceFile/v2-8 32.2µs ±13% 23.9µs ± 1% -25.79% (p=0.008 n=5+5)
ReferenceFile/v1-8 270µs ± 2% 264µs ± 2% ~ (p=0.095 n=5+5)
ReferenceFile/bs-8 291µs ± 0% 294µs ± 0% +0.88% (p=0.008 n=5+5)
name old alloc/op new alloc/op delta
ReferenceFile/v2-8 37.1kB ± 0% 6.7kB ± 0% -81.91% (p=0.008 n=5+5)
ReferenceFile/v1-8 131kB ± 0% 131kB ± 0% ~ (p=0.444 n=5+5)
ReferenceFile/bs-8 80.8kB ± 0% 80.8kB ± 0% ~ (p=0.571 n=5+5)
name old allocs/op new allocs/op delta
ReferenceFile/v2-8 152 ± 0% 148 ± 0% -2.63% (p=0.008 n=5+5)
ReferenceFile/v1-8 2.65k ± 0% 2.65k ± 0% ~ (all equal)
ReferenceFile/bs-8 1.73k ± 0% 1.73k ± 0% ~ (all equal)
~/s/g/p/g/benchmark$ go test -bench=.
goos: linux
goarch: amd64
pkg: github.com/pelletier/go-toml/v2/benchmark
cpu: Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz
BenchmarkUnmarshalSimple/v2-8 1692444 710.7 ns/op
BenchmarkUnmarshalSimple/v1-8 307609 3862 ns/op
BenchmarkUnmarshalSimple/bs-8 520429 2285 ns/op
BenchmarkReferenceFile/v2-8 50395 24006 ns/op 6704 B/op 148 allocs/op
BenchmarkReferenceFile/v1-8 4144 264655 ns/op 130567 B/op 2649 allocs/op
BenchmarkReferenceFile/bs-8 3969 293635 ns/op 80784 B/op 1729 allocs/op
PASS
ok github.com/pelletier/go-toml/v2/benchmark 8.143s
```
2021-03-25 22:37:16 -04:00
..
2021-03-25 20:46:31 -04:00
2021-03-25 22:37:16 -04:00
2021-03-25 19:56:02 -04:00