perf: bitpack encoding for LID and MID blocks (draft, work in progress)

[cheb0]

Description

Fixes #312

---

• I have read and followed all requirements in CONTRIBUTING.md;
• I used LLM/AI assistance to make this pull request;

If you have used LLM/AI assistance please provide model name and full prompt:

Model: {{model-name}}
Prompt: {{prompt}}

[cheb0]

@seqbenchbot up main search-logbench

[seqbenchbot]

Nice, @cheb0 <(-^,^-)=b!

Your request was successfully served.
Identificator for your ongoing benchmark - acee5e23.

Here is a list of helpful links:

• Take a look at [Grafana](https://comparison.seqbench.ozon.dev/grafana/d/1f4558f2-1bd6-4034-b6db-6607726e78df?var-scenario=search-logbench&var-container=seqbench-seqdb-acee5e23-baseline&var-container=seqbench-seqdb-acee5e23-comparison&from=seqbench-seqdb-acee5e23-comparison%!(EXTRA string=2026-02-06T14:06:53.520Z)) dashboard;
• Live-tailing logs are also available;

Have a great time!

[seqbenchbot]

Nice, @cheb0 <(-^,^-)=b!

The benchmark with identificator acee5e23 was finished.

Take a look at the benchmark report:

Query	Type	Baseline avg (µs)	Comparison avg (µs)	Diff %	Baseline fetched	Comparison fetched
service:payment-backend-us	cold	63976 ± 17888	70345 ± 38981	10.0%	100	100
service:payment-backend-us	warm	4147 ± 630	4264 ± 801	2.8%	100	100
service:payment-backend-us AND level:[0 to 3]	cold	343424 ± 73380	340039 ± 52058	-1.0%	100	100
service:payment-backend-us AND level:[0 to 3]	warm	8496 ± 624	6621 ± 647	-22.1%	100	100
find errors + filter out	cold	576759 ± 55683	569551 ± 37205	-1.2%	100	100
find errors + filter out	warm	19651 ± 1429	17066 ± 1435	-13.2%	100	100
find service logs + filter out more	cold	122315 ± 14505	96614 ± 21991	-21.0%	100	100
find service logs + filter out more	warm	4775 ± 443	4802 ± 696	0.6%	100	100
find errors (not found)	cold	0 ± 0	0 ± 0	—	0	0
find errors (not found)	warm	0 ± 0	0 ± 0	—	0	0
k8s_pod:payment-backend-us-* AND transaction_id:'tx-needle00-0000'	cold	460482 ± 79713	451231 ± 49460	-2.0%	27	27
k8s_pod:payment-backend-us-* AND transaction_id:'tx-needle00-0000'	warm	12656 ± 1830	11445 ± 671	-9.6%	27	27
k8s_pod:payment-backend-us-* AND transaction_id:'tx-needle99-0000'	cold	315551 ± 61350	327520 ± 50940	3.8%	0	0
k8s_pod:payment-backend-us-* AND transaction_id:'tx-needle99-0000'	warm	3043 ± 306	2537 ± 397	-16.6%	0	0
k8s_pod:payment-backend-us-* AND transaction_id:'needle'	cold	604001 ± 81309	598762 ± 108584	-0.9%	100	100
k8s_pod:payment-backend-us-* AND transaction_id:'needle'	warm	33337 ± 3659	33414 ± 1845	0.2%	100	100
service:api-gateway-us AND resource:'/assets/css/bootstrap.css' AND method:'GET' AND status:200 AND size:[990 TO *]	cold	851456 ± 76419	663765 ± 104408	-22.0%	44	44
service:api-gateway-us AND resource:'/assets/css/bootstrap.css' AND method:'GET' AND status:200 AND size:[990 TO *]	warm	28611 ± 2628	28298 ± 1065	-1.1%	44	44
service:*, hist 10s	cold	2704952 ± 411871	2979813 ± 203919	10.2%	100	100
service:*, hist 10s	warm	470412 ± 48257	442370 ± 39569	-6.0%	100	100
k8s_namespace:prod AND level:[0 to 3], hist 10s	cold	2198101 ± 70370	2292255 ± 178078	4.3%	100	100
k8s_namespace:prod AND level:[0 to 3], hist 10s	warm	109745 ± 19514	57883 ± 11445	-47.3%	100	100
service:payment-backend-eu, 10s	cold	2095573 ± 364017	2036543 ± 254187	-2.8%	100	100
service:payment-backend-eu, 10s	warm	79025 ± 15456	31616 ± 3883	-60.0%	100	100
service:payment-backend-eu AND level:[0 to 3], hist 10s	cold	652027 ± 70090	608620 ± 37594	-6.7%	100	100
service:payment-backend-eu AND level:[0 to 3], hist 10s	warm	15029 ± 1153	9884 ± 320	-34.2%	100	100
service:payment-backend-eu, group by k8s_pod count(*)	cold	1095726 ± 149941	1012533 ± 70945	-7.6%	100	100
service:payment-backend-eu, group by k8s_pod count(*)	warm	466318 ± 25596	471066 ± 32696	1.0%	100	100
service:payment-backend-eu, group by (10s) k8s_pod count(*)	cold	2947944 ± 292646	2754032 ± 257011	-6.6%	100	100
service:payment-backend-eu, group by (10s) k8s_pod count(*)	warm	518269 ± 35833	480688 ± 36359	-7.3%	100	100
service:payment-backend-eu, group by k8s_pod min(level)	cold	1433407 ± 143198	1286581 ± 48145	-10.2%	100	100
service:payment-backend-eu, group by k8s_pod min(level)	warm	604148 ± 43726	622583 ± 52757	3.1%	100	100
service:payment-backend-eu, group by (10s) k8s_pod min(level)	cold	2930017 ± 307797	3030298 ± 193062	3.4%	100	100
service:payment-backend-eu, group by (10s) k8s_pod min(level)	warm	663165 ± 40858	620200 ± 35426	-6.5%	100	100
service:api-gateway-us, group by method avg(size)	cold	1061285 ± 63965	1075706 ± 63632	1.4%	100	100
service:api-gateway-us, group by method avg(size)	warm	356110 ± 28288	366487 ± 21184	2.9%	100	100
service:api-gateway-us AND resource:'/api/v1/audit/' AND status:404, group by client_ip count()	cold	1802497 ± 55112	1727052 ± 62104	-4.2%	100	100
service:api-gateway-us AND resource:'/api/v1/audit/' AND status:404, group by client_ip count()	warm	961252 ± 32719	968043 ± 40924	0.7%	100	100

Have a great time!