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aimuz 917f78ce4e
net/netip: optimize parseIPv4 and refactor IPv6 embedded IPv4 parsing
This change refactors the parseIPv4 function to extract a new helper
function, parseIPv4Fields, which is now used by both parseIPv4 and
parseIPv6 functions. The extraction of this logic into a separate
helper function removes code duplication and improves the performance
of parsing IPv6 addresses that contain an embedded IPv4 address.

Additionally, the error handling within the IP address parsing logic
has been streamlined to provide clearer messages when encountering
incorrect formats or values in IPv4 fields.

Benchmark:

benchstat old.out new.out
goos: darwin
goarch: amd64
pkg: net/netip
cpu: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
                             │    old.out    │               new.out               │
                             │    sec/op     │   sec/op     vs base                │
ParseAddr/v4-12                 22.23n ±  2%   21.86n ± 2%        ~ (p=0.127 n=10)
ParseAddr/v6-12                 69.67n ±  7%   70.31n ± 1%        ~ (p=0.128 n=10)
ParseAddr/v6_ellipsis-12        48.22n ± 17%   48.58n ± 1%        ~ (p=0.739 n=10)
ParseAddr/v6_v4-12              60.73n ± 36%   51.54n ± 1%  -15.14% (p=0.000 n=10)
ParseAddr/v6_zone-12           102.50n ± 22%   93.50n ± 0%   -8.79% (p=0.000 n=10)
ParseAddrPort/v4-12             38.07n ±  1%   36.84n ± 2%   -3.22% (p=0.000 n=10)
ParseAddrPort/v6-12             84.61n ±  1%   87.21n ± 1%   +3.07% (p=0.000 n=10)
ParseAddrPort/v6_ellipsis-12    69.65n ±  8%   64.56n ± 2%   -7.31% (p=0.023 n=10)
ParseAddrPort/v6_v4-12          71.88n ±  1%   70.61n ± 1%   -1.76% (p=0.000 n=10)
ParseAddrPort/v6_zone-12        119.0n ±  2%   118.0n ± 2%        ~ (p=0.108 n=10)
geomean                         62.38n         60.17n        -3.54%

                             │   old.out    │               new.out               │
                             │     B/op     │    B/op     vs base                 │
ParseAddr/v4-12                0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddr/v6-12                0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddr/v6_ellipsis-12       0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddr/v6_v4-12             0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddr/v6_zone-12           0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddrPort/v4-12            0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddrPort/v6-12            0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddrPort/v6_ellipsis-12   0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddrPort/v6_v4-12         0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddrPort/v6_zone-12       0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
geomean                                   ²               +0.00%                ²
¹ all samples are equal
² summaries must be >0 to compute geomean

                             │   old.out    │               new.out               │
                             │  allocs/op   │ allocs/op   vs base                 │
ParseAddr/v4-12                0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddr/v6-12                0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddr/v6_ellipsis-12       0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddr/v6_v4-12             0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddr/v6_zone-12           0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddrPort/v4-12            0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddrPort/v6-12            0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddrPort/v6_ellipsis-12   0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddrPort/v6_v4-12         0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
ParseAddrPort/v6_zone-12       0.000 ± 0%     0.000 ± 0%       ~ (p=1.000 n=10) ¹
geomean                                   ²               +0.00%                ²
¹ all samples are equal
² summaries must be >0 to compute geomean
2023-11-18 11:29:51 +08:00
.github .github: issue template for telemetry proposals 2023-09-14 21:29:10 +00:00
api math/big: implement Rat.FloatPrec 2023-11-14 00:44:42 +00:00
doc crypto/tls: remove RSA KEX ciphers from the default list 2023-11-14 18:03:29 +00:00
lib/time lib/time: update to 2023c/2023c 2023-05-03 20:14:11 +00:00
misc misc/wasm: silence Wasmtime 14 CLI warning 2023-11-02 21:23:37 +00:00
src net/netip: optimize parseIPv4 and refactor IPv6 embedded IPv4 parsing 2023-11-18 11:29:51 +08:00
test cmd/compile/internal/inline: refactor AnalyzeFunc 2023-11-16 20:15:25 +00:00
.gitattributes
.gitignore internal/platform,cmd/dist: export the list of supported platforms 2023-06-22 19:44:52 +00:00
CONTRIBUTING.md doc: normalize proposal-process links 2023-03-29 22:00:27 +00:00
LICENSE
PATENTS
README.md README: update from CC-BY-3.0 to CC-BY-4.0 2022-11-02 20:14:56 +00:00
SECURITY.md SECURITY.md: update the Reporting a Vulnerability link 2023-09-22 21:17:24 +00:00
codereview.cfg
go.env cmd/go: additional doc-inspired tests and bug fixes 2023-06-06 19:18:46 +00:00

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