perf: fix cpu usage in cache #2260

Job	Run time
Run E2E tests (mysql, mysql, 3306)	4m 0s
Run E2E tests (pg, postgres, 5432)	3m 57s
Build Registry (src, refs/pull/626/merge)	15s
Build ILC (src, refs/pull/626/merge)	1m 34s
Build Registry (dest, master)	20s
Common checks	58s
Build ILC (dest, master)	9m 17s
Test Registry (src, refs/pull/626/merge, sqlite3)	1m 31s
Test Registry (src, refs/pull/626/merge, mysql, mysql, 3306)	1m 26s
Test Registry (src, refs/pull/626/merge, pg, postgres, 5432)	1m 32s
Test Registry (dest, master, sqlite3)	1m 26s
Test Registry (dest, master, mysql, mysql, 3306)	1m 26s
Test Registry (dest, master, pg, postgres, 5432)	1m 29s
PR Coverage Report	6s
Push images to registry	11s
Build documentation	0s
	29m 28s

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