fix: connection close hang #658
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Fix connection Close hanging if CLIENT REPLY is set to OFF or SKIP. This includes a rework of how command actions are handled to use a single map lookup based on generated permutations to improve performance and allow it to be used in both activeConn and conn. Replication of this lookup is need as its impossible to share information between the different Conn interface implementations due to returning interface instead of concrete type. The performance improvements, 33-89% sec/op and eliminating all memory allocations, help to mitigate the impact of double lookup. This also expands the benchmark coverage to allow for wider validation of this change. Fixes #361 go test -run=^$ -bench=BenchmarkLookupCommand -count=10 -benchmem > orig.log benchstat orig.log permute.log goos: linux goarch: amd64 pkg: github.com/gomodule/redigo/redis cpu: 11th Gen Intel(R) Core(TM) i9-11900H @ 2.50GHz │ orig.log │ permute.log │ │ sec/op │ sec/op vs base │ LookupCommandInfoCorrectCase-16 55.89n ± 7% 37.24n ± 2% -33.37% (p=0.000 n=10) LookupCommandInfoMixedCase-16 359.85n ± 9% 38.79n ± 2% -89.22% (p=0.000 n=10) LookupCommandInfoNoMatch-16 262.45n ± 1% 36.98n ± 4% -85.91% (p=0.000 n=10) geomean 174.1n 37.66n -78.37% │ orig.log │ permute.log │ │ B/op │ B/op vs base │ LookupCommandInfoCorrectCase-16 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ LookupCommandInfoMixedCase-16 32.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10) LookupCommandInfoNoMatch-16 8.000 ± 0% 0.000 ± 0% -100.00% (p=0.000 n=10) geomean ² ? ² ³ ¹ all samples are equal ² summaries must be >0 to compute geomean ³ ratios must be >0 to compute geomean │ orig.log │ permute.log │ │ allocs/op │ allocs/op vs base │ LookupCommandInfoCorrectCase-16 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=10) ¹ LookupCommandInfoMixedCase-16 4.000 ± 0% 0.000 ± 0% -100.00% (p=0.000 n=10) LookupCommandInfoNoMatch-16 2.000 ± 0% 0.000 ± 0% -100.00% (p=0.000 n=10) geomean ² ? ² ³ ¹ all samples are equal ² summaries must be >0 to compute geomean ³ ratios must be >0 to compute geomean
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This was referenced Feb 8, 2024
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Add support for newer command which impact the state of a client connection hence need special handling when returning connections to the pool. Also add missing type assertions for ConnWithContext on connection types.
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Fix connection
Close()hanging ifCLIENT REPLYis set toOFForSKIP.This includes a rework of how command actions are handled to use a single map lookup based on generated permutations to improve performance and allow it to be used in both
activeConnandconn. Replication of this lookup is need as its impossible to share information between the differentConninterface implementations due to returning interface instead of concrete type.The performance improvements, 33-89% sec/op and eliminating all memory allocations, help to mitigate the impact of double lookup.
This also expands the benchmark coverage to allow for wider validation of this change.
Fixes #361