Custom function and script responses

[adam-fowler]

Code generator will attempt to choose the correct return value for a Valkey command, but it can only do simple types like String, Int, Array of RESP Tokens. If we want to provide more complex responses we have to write some custom code. To do this

• disable the return value generation for that command in the code generator
• override the Response typealias in the ValkeyCommand type
• provide a method to initialise this Response from a RESPToken.

Also in this PR

• moved integration tests, testing commands into separate file
• Added command test helper testCommandEncodesDecodes and use in script and server commands, will extend to others in separate PR

[github-actions]

✅ Pull request no significant performance differences ✅

Summary

New baseline 'pull_request' is WITHIN the 'main' baseline thresholds.

Full Benchmark Comparison

Comparing results between 'main' and 'pull_request'

Host '8b5179603778' with 4 'x86_64' processors with 15 GB memory, running:
#18~24.04.1-Ubuntu SMP Sat Jun 28 04:46:03 UTC 2025

ValkeyBenchmarks

Client: GET benchmark metrics

Malloc (total): results within specified thresholds, fold down for details.

Malloc (total) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	81	82	84	88	89	89	89	6
pull_request	83	84	85	87	88	88	88	6
Δ	2	2	1	-1	-1	-1	-1	0
Improvement %	-2	-2	-1	1	1	1	1	0

Client: GET benchmark | parallel 20 | 20 concurrent connections metrics

Malloc (total): results within specified thresholds, fold down for details.

Malloc (total) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	97	100	102	106	110	110	110	24
pull_request	94	99	102	106	110	113	113	25
Δ	-3	-1	0	0	0	3	3	1
Improvement %	3	1	0	0	0	-3	-3	1

Connection: GET benchmark metrics

Malloc (total): results within specified thresholds, fold down for details.

Malloc (total) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	4	4	4	4	4	4	4	8
pull_request	4	4	4	4	4	4	4	8
Δ	0	0	0	0	0	0	0	0
Improvement %	0	0	0	0	0	0	0	0

Connection: GET benchmark – NoOpTracer metrics

Malloc (total): results within specified thresholds, fold down for details.

Malloc (total) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	7	8	8	10	10	10	10	8
pull_request	7	8	8	10	10	10	10	8
Δ	0	0	0	0	0	0	0	0
Improvement %	0	0	0	0	0	0	0	0

Connection: Pipeline array benchmark metrics

Malloc (total): results within specified thresholds, fold down for details.

Malloc (total) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	33	33	33	34	34	34	34	6
pull_request	33	33	34	34	34	34	34	5
Δ	0	0	1	0	0	0	0	-1
Improvement %	0	0	-3	0	0	0	0	-1

Connection: Pipeline benchmark metrics

Malloc (total): results within specified thresholds, fold down for details.

Malloc (total) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	31	33	33	34	34	34	34	6
pull_request	33	33	33	34	34	34	34	5
Δ	2	0	0	0	0	0	0	-1
Improvement %	-6	0	0	0	0	0	0	-1

HashSlot – {user}.whatever metrics

Malloc (total): results within specified thresholds, fold down for details.

Malloc (total) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	0	0	0	0	0	0	0	18
pull_request	0	0	0	0	0	0	0	18
Δ	0	0	0	0	0	0	0	0
Improvement %	0	0	0	0	0	0	0	0

ValkeyCommandEncoder – Command with 7 words metrics

Malloc (total): results within specified thresholds, fold down for details.

Malloc (total) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	0	0	0	0	0	0	0	724
pull_request	0	0	0	0	0	0	0	740
Δ	0	0	0	0	0	0	0	16
Improvement %	0	0	0	0	0	0	0	16

ValkeyCommandEncoder – Simple GET metrics

Malloc (total): results within specified thresholds, fold down for details.

Malloc (total) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	0	0	0	0	0	0	0	1843
pull_request	0	0	0	0	0	0	0	1889
Δ	0	0	0	0	0	0	0	46
Improvement %	0	0	0	0	0	0	0	46

ValkeyCommandEncoder – Simple MGET 15 keys metrics

Malloc (total): results within specified thresholds, fold down for details.

Malloc (total) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	0	0	0	0	0	0	0	353
pull_request	0	0	0	0	0	0	0	359
Δ	0	0	0	0	0	0	0	6
Improvement %	0	0	0	0	0	0	0	6