Benchmark Data

Summary Links

madkins/sloggy is a new slog.Handler built from the ground up to generate JSON log records. While the performance isn't top-tier, this handler adheres faithfully to documented slog.Handler and observed slog.JSONHandler behavior. The madkins/flash handler, derived from this one, has better performance.

madkins/flash
madkins/sloggy

Benchmark Data

Benchmark	Runs	Ns/Op	Allocs/Op	Bytes/Op	MB/Sec
Attributes	427,345	2,826.00	64	1,384	158.55
Big Group	17,518	68,957.00	2,358	25,120	174.48
Disabled	320,593,141	3.75	0	0	0.00
Key Values	416,635	2,863.00	64	1,384	156.14
Logging	17,457	68,537.00	1,865	26,992	140.25
Simple	1,759,131	692.10	14	240	128.60
Simple Source	646,135	1,756.00	30	1,280	162.31
With Attrs Attributes	397,540	2,933.00	64	1,384	286.06
With Attrs Key Values	411,616	2,891.00	64	1,384	289.85
With Attrs Simple	1,716,230	692.30	14	240	693.31
With Group Attributes	379,204	2,839.00	64	1,384	163.06
With Group Key Values	399,204	2,983.00	64	1,384	155.21

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 madkins/sloggy

Benchmark Data

Warnings