Why is the performance of version 1.23 much worse than version 1.3, even though it is a newer version?

[PaladinChendi]

This is the test result for LevelDB version 1.3:
LevelDB: version 1.3
Date: Mon Jul 15 18:45:08 2024
CPU: 32 * Intel(R) Xeon(R) Silver 4110 CPU @ 2.10GHz
CPUCache: 11264 KB
Keys: 16 bytes each
Values: 100 bytes each (50 bytes after compression)
Entries: 1000000
RawSize: 110.6 MB (estimated)
FileSize: 62.9 MB (estimated)
WARNING: Snappy compression is not enabled

fillseq : 1.258 micros/op; 87.9 MB/s
fillsync : 51.962 micros/op; 2.1 MB/s (1000 ops)
fillrandom : 2.708 micros/op; 40.9 MB/s
overwrite : 3.308 micros/op; 33.4 MB/s
readrandom : 4.176 micros/op;
readrandom : 3.605 micros/op;
readseq : 0.207 micros/op; 533.6 MB/s
readreverse : 0.443 micros/op; 249.7 MB/s
compact : 469437.000 micros/op;
readrandom : 3.162 micros/op;
readseq : 0.180 micros/op; 613.0 MB/s
readreverse : 0.390 micros/op; 283.6 MB/s
fill100K : 645.583 micros/op; 147.7 MB/s (1000 ops)
crc32c : 4.290 micros/op; 910.6 MB/s (4K per op)
snappycomp : 3860.000 micros/op; (snappy failure)
snappyuncomp : 3454.000 micros/op; (snappy failure)
acquireload : 0.380 micros/op; (each op is 1000 loads)

This is the test result for LevelDB version 1.23:
LevelDB: version 1.23
Date: Mon Jul 15 18:44:15 2024
CPU: 32 * Intel(R) Xeon(R) Silver 4110 CPU @ 2.10GHz
CPUCache: 11264 KB
Keys: 16 bytes each
Values: 100 bytes each (50 bytes after compression)
Entries: 1000000
RawSize: 110.6 MB (estimated)
FileSize: 62.9 MB (estimated)
WARNING: Snappy compression is not enabled

fillseq : 3.384 micros/op; 32.7 MB/s
fillsync : 150.690 micros/op; 0.7 MB/s (1000 ops)
fillrandom : 4.085 micros/op; 27.1 MB/s
overwrite : 4.371 micros/op; 25.3 MB/s
readrandom : 4.996 micros/op; (864322 of 1000000 found)
readrandom : 4.198 micros/op; (864083 of 1000000 found)
readseq : 0.188 micros/op; 586.9 MB/s
readreverse : 0.410 micros/op; 269.9 MB/s
compact : 621397.000 micros/op;
readrandom : 3.025 micros/op; (864105 of 1000000 found)
readseq : 0.183 micros/op; 603.7 MB/s
readreverse : 0.413 micros/op; 267.5 MB/s
fill100K : 551.234 micros/op; 173.0 MB/s (1000 ops)
crc32c : 2.521 micros/op; 1549.6 MB/s (4K per op)
snappycomp : 4267.000 micros/op; (snappy failure)
snappyuncomp : 3853.000 micros/op; (snappy failure)

Why is the performance of version 1.23 much worse than version 1.3, even though it is a newer version?