LmdbJava Performance Regression Testing

⚠️ SMOKETEST RESULTS
This report was generated from a smoketest run and should NOT be used for performance comparisons or production decisions. Smoketest results have:

No warmup iterations

Single iteration

Minimal entry counts

Short runtime

For valid performance results, run the benchmark script with benchmark mode instead.

Performance Analysis

The following tables show each benchmark ranked by performance, with percentage difference from the fastest version. Branch versions (e.g., master#65df2ee) are highlighted in bold.

Read by Key

Rank	Version	ms/op	vs Fastest
1	`0.5.0`	0.055	baseline
2	`0.0.5`	0.056	+1.1%
3	`master#65df2ee`	0.057	+3.4%
4	`0.8.3`	0.067	+21.9%
5	`0.9.1`	0.077	+40.7%

Write Entry

Rank	Version	ms/op	vs Fastest
1	`0.5.0`	0.150	baseline
2	`0.0.5`	0.152	+1.2%
3	`master#65df2ee`	0.159	+6.1%
4	`0.8.3`	0.161	+6.8%
5	`0.9.1`	0.287	+90.8%

Calculate xxHash64

Rank	Version	ms/op	vs Fastest
1	`0.5.0`	0.057	baseline
2	`0.8.3`	0.059	+3.6%
3	`0.0.5`	0.059	+3.8%
4	`master#65df2ee`	0.059	+3.8%
5	`0.9.1`	0.060	+5.0%

Iterate Sequentially

Rank	Version	ms/op	vs Fastest
1	`0.9.1`	0.025	baseline
2	`0.0.5`	0.026	+0.4%
3	`0.5.0`	0.026	+1.7%
4	`0.8.3`	0.026	+2.8%
5	`master#65df2ee`	0.029	+12.7%

Iterate Reverse

Rank	Version	ms/op	vs Fastest
1	`0.0.5`	0.025	baseline
2	`0.8.3`	0.026	+2.0%
3	`0.5.0`	0.026	+2.4%
4	`0.9.1`	0.026	+3.9%
5	`master#65df2ee`	0.027	+6.6%

Calculate CRC32

Rank	Version	ms/op	vs Fastest
1	`0.9.1`	0.075	baseline
2	`0.0.5`	0.076	+1.7%
3	`0.8.3`	0.077	+2.2%
4	`master#65df2ee`	0.077	+2.4%
5	`0.5.0`	0.077	+2.5%

Tested Versions

Test Configuration

The benchmark was executed on 2025-11-07 using LmdbJava Benchmarks.

All tests use the LmdbJava Agrona implementation with the following configuration:

Test Environment

CPU	Intel(R) Xeon(R) Platinum 8370C CPU @ 2.80GHz (4 cores)
RAM	16 GiB
OS	Linux 6.11.0-1018-azure (x86_64)
Java	25.0.1

Benchmark Configuration

Implementation: LmdbJava Agrona only
Test Profile: Run 4 sequential integer configuration (100-byte values)
Key Type: Sequential 32-bit integers
Value Size: 100 bytes
Access Pattern: Sequential
Benchmarks: All 6 operations (readCrc, readKey, readRev, readSeq, readXxh64, write)