[stable-25-1] Improve tiny ydb perfomance (#19909)

[kruall]

Changelog entry

Significantly improved performance for single-core, dual-core, and triple-core configurations

Changelog category

• Performance improvement

Description for reviewers

...

[github-actions]

⚪ 2025-06-19 18:58:58 UTC Pre-commit check linux-x86_64-release-asan for 2cfa7b6 has started.
⚪ 2025-06-19 18:59:09 UTC Artifacts will be uploaded here
⚪ 2025-06-19 19:02:32 UTC ya make is running...
🟡 2025-06-19 20:59:07 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
14675	14534	0	40	65	36

⚪ 2025-06-19 21:00:27 UTC ya make is running... (failed tests rerun, try 2)
🟡 2025-06-19 21:20:53 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet Going to retry failed tests...

Test history | Ya make output | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
184 (only retried tests)	80	0	8	62	34

⚪ 2025-06-19 21:21:12 UTC ya make is running... (failed tests rerun, try 3)
🟡 2025-06-19 21:41:41 UTC Some tests failed, follow the links below. This fail is not in blocking policy yet

Test history | Ya make output | Test bloat | Test bloat | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
133 (only retried tests)	33	0	7	58	35

🟢 2025-06-19 21:41:48 UTC Build successful.
🟢 2025-06-19 21:42:17 UTC ydbd size 3.7 GiB changed* by +58.7 KiB, which is < 100.0 KiB vs stable-25-1: OK

ydbd size dash	stable-25-1: fac5e1c	merge: 2cfa7b6	diff	diff %
ydbd size	3 928 368 752 Bytes	3 928 428 880 Bytes	+58.7 KiB	+0.002%
ydbd stripped size	1 373 723 552 Bytes	1 373 745 952 Bytes	+21.9 KiB	+0.002%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}

[github-actions]

🟢 2025-06-19 18:59:19 UTC The validation of the Pull Request description is successful.

[github-actions]

⚪ 2025-06-19 18:59:58 UTC Pre-commit check linux-x86_64-relwithdebinfo for 2cfa7b6 has started.
⚪ 2025-06-19 19:00:09 UTC Artifacts will be uploaded here
⚪ 2025-06-19 19:03:25 UTC ya make is running...
🟢 2025-06-19 20:42:32 UTC Tests successful.

Test history | Ya make output | Test bloat

TESTS	PASSED	ERRORS	FAILED	SKIPPED	MUTED?
28753	26236	0	0	2453	64

🟢 2025-06-19 20:44:58 UTC Build successful.
🟢 2025-06-19 20:45:14 UTC ydbd size 2.1 GiB changed* by +42.2 KiB, which is < 100.0 KiB vs stable-25-1: OK

ydbd size dash	stable-25-1: fac5e1c	merge: 2cfa7b6	diff	diff %
ydbd size	2 258 265 728 Bytes	2 258 308 976 Bytes	+42.2 KiB	+0.002%
ydbd stripped size	478 036 216 Bytes	478 047 032 Bytes	+10.6 KiB	+0.002%

^{*please be aware that the difference is based on comparing your commit and the last completed build from the post-commit, check comparation}