Benchmark Data

Summary Links

slog/JSONHandler is the JSON handler provided with the slog library. It is fast and as a part of the Go distribution it is used along with published documentation as a model for slog.Handler behavior.

slog/JSONHandler

Benchmark Data

Benchmark	Runs	Ns/Op	Allocs/Op	Bytes/Op	MB/Sec
Attributes	803,263	1,502.00	6	472	277.59
Big Group	51,270	23,819.00	1	48	442.28
Disabled	307,638,812	3.99	0	0	0.00
Key Values	778,650	1,530.00	6	472	272.62
Logging	46,228	27,730.00	0	0	317.28
Simple	3,962,881	302.00	0	0	274.86
Simple Source	1,424,109	865.70	6	568	319.96
With Attrs Attributes	807,038	1,494.00	6	472	523.43
With Attrs Key Values	777,950	1,558.00	6	472	502.55
With Attrs Simple	3,699,673	299.80	0	0	1,497.58
With Group Attributes	773,347	1,537.00	6	472	280.37
With Group Key Values	785,809	1,567.00	6	472	274.97

Benchmark Charts

Warnings

Suggested

Duplicates Duplicate field(s) found

Some handlers (e.g. slog.JSONHandler) will output multiple occurrences of the same field name if the logger is called with multiple instances of the same field, generally by using WithAttrs and then the same fields in the eventual log call (e.g. Info). This behavior is currently under debate with no resolution at this time (2024-01-15) and a release milestone of (currently unscheduled) Go 1.23, (whereas Go Release 1.22 is currently expected in February 2024).

Verify: Attribute Duplicate		map[alpha:2 charlie:3]

Verify: Attribute With Duplicate		map[alpha:2 charlie:3]

Handler slog/JSONHandler

Benchmark Data

Warnings