set_regex_discard_policy doesn't need mut

[antonok-edm]

it should be safe:

• single-thread enabled: no concurrency
• single-thread disabled: Mutex guarded

[github-actions]

Rust Benchmark

Details

Benchmark suite	Current: e47311b	Previous: 407c3e4	Ratio
rule-match-browserlike/brave-list	2248269745 ns/iter (± 25790990)	2412309277 ns/iter (± 20472813)	0.93
rule-match-first-request/brave-list	1383384 ns/iter (± 11397)	1487840 ns/iter (± 18276)	0.93
blocker_new/brave-list	113175264 ns/iter (± 686551)	115035897 ns/iter (± 540336)	0.98
blocker_new/brave-list-deserialize	27872134 ns/iter (± 1498669)	39312725 ns/iter (± 1282662)	0.71
memory-usage-final/brave-list-initial	9560762 B/iter (± 0)	9560762 B/iter (± 0)	1
memory-usage-final/brave-list-1000-requests	3157476 B/iter (± 0)	3157476 B/iter (± 0)	1
memory-usage-max/brave-list-initial/max	32069450 B/iter (± 0)	32069450 B/iter (± 0)	1
memory-usage-alloc-count/brave-list-initial/alloc-count	282954 allocs/iter (± 0)	282954 allocs/iter (± 0)	1
memory-usage-alloc-count/brave-list-1000-requests/alloc-count	80015 allocs/iter (± 0)	80015 allocs/iter (± 0)	1
url_cosmetic_resources/brave-list	184187 ns/iter (± 779)	193923 ns/iter (± 905)	0.95
cosmetic-class-id-match/brave-list	3452914 ns/iter (± 920076)	3344010 ns/iter (± 856464)	1.03

This comment was automatically generated by workflow using github-action-benchmark.