PGO results for LMDB in-memory

00Before

violino:~/OD/mdb/libraries/liblmdb> rm -rf /tmp/leveldbtest-1000/*
violino:~/OD/mdb/libraries/liblmdb> ./db_bench_mdb.no_profile  --num=10000000
LMDB:       version LMDB 0.9.14: (June 20, 2014)
Date:       Sat Jul  5 10:47:17 2014
CPU:        4 * Intel(R) Core(TM)2 Extreme CPU Q9300  @ 2.53GHz
CPUCache:   6144 KB
Keys:       16 bytes each
Values:     100 bytes each (50 bytes after compression)
Entries:    10000000
RawSize:    1106.3 MB (estimated)
FileSize:   629.4 MB (estimated)
------------------------------------------------
fillrandsync :       6.018 micros/op 166162 ops/sec;   18.4 MB/s (10000 ops)
1888	/tmp/leveldbtest-1000/dbbench_mdb-1
1888	/tmp/leveldbtest-1000
fillrandom   :       5.299 micros/op 188712 ops/sec;   20.9 MB/s
1166112	/tmp/leveldbtest-1000/dbbench_mdb-2
1166112	/tmp/leveldbtest-1000
fillrandbatch :       4.702 micros/op 212694 ops/sec;   23.5 MB/s
1180420	/tmp/leveldbtest-1000/dbbench_mdb-3
1180420	/tmp/leveldbtest-1000
fillseqsync  :       4.608 micros/op 217004 ops/sec;   24.0 MB/s (10000 ops)
1312	/tmp/leveldbtest-1000/dbbench_mdb-4
1312	/tmp/leveldbtest-1000
fillseq      :       2.308 micros/op 433367 ops/sec;   47.9 MB/s
1258128	/tmp/leveldbtest-1000/dbbench_mdb-5
1258128	/tmp/leveldbtest-1000
fillseqbatch :       0.440 micros/op 2271685 ops/sec;  251.3 MB/s
1258128	/tmp/leveldbtest-1000/dbbench_mdb-6
1258128	/tmp/leveldbtest-1000
overwrite    :       6.071 micros/op 164706 ops/sec;   18.2 MB/s
1258128	/tmp/leveldbtest-1000/dbbench_mdb-6
1258128	/tmp/leveldbtest-1000
readrandom   :       1.690 micros/op 591578 ops/sec; (10000000 of 10000000 found)
readseq      :       0.055 micros/op 18098499 ops/sec; 2002.2 MB/s
readreverse  :       0.051 micros/op 19581542 ops/sec; 2166.2 MB/s

01After

violino:~/OD/mdb/libraries/liblmdb> rm -rf /tmp/leveldbtest-1000/*
violino:~/OD/mdb/libraries/liblmdb> ./db_bench_mdb.profiled --num=10000000
LMDB:       version LMDB 0.9.14: (June 20, 2014)
Date:       Sat Jul  5 10:43:50 2014
CPU:        4 * Intel(R) Core(TM)2 Extreme CPU Q9300  @ 2.53GHz
CPUCache:   6144 KB
Keys:       16 bytes each
Values:     100 bytes each (50 bytes after compression)
Entries:    10000000
RawSize:    1106.3 MB (estimated)
FileSize:   629.4 MB (estimated)
------------------------------------------------
fillrandsync :       5.662 micros/op 176612 ops/sec;   19.5 MB/s (10000 ops)
1888	/tmp/leveldbtest-1000/dbbench_mdb-1
1888	/tmp/leveldbtest-1000
fillrandom   :       4.909 micros/op 203697 ops/sec;   22.5 MB/s
1166112	/tmp/leveldbtest-1000/dbbench_mdb-2
1166112	/tmp/leveldbtest-1000
fillrandbatch :       4.620 micros/op 216433 ops/sec;   23.9 MB/s
1180420	/tmp/leveldbtest-1000/dbbench_mdb-3
1180420	/tmp/leveldbtest-1000
fillseqsync  :       4.326 micros/op 231171 ops/sec;   25.6 MB/s (10000 ops)
1312	/tmp/leveldbtest-1000/dbbench_mdb-4
1312	/tmp/leveldbtest-1000
fillseq      :       1.984 micros/op 504040 ops/sec;   55.8 MB/s
1258128	/tmp/leveldbtest-1000/dbbench_mdb-5
1258128	/tmp/leveldbtest-1000
fillseqbatch :       0.424 micros/op 2359528 ops/sec;  261.0 MB/s
1258128	/tmp/leveldbtest-1000/dbbench_mdb-6
1258128	/tmp/leveldbtest-1000
overwrite    :       5.620 micros/op 177921 ops/sec;   19.7 MB/s
1258128	/tmp/leveldbtest-1000/dbbench_mdb-6
1258128	/tmp/leveldbtest-1000
readrandom   :       1.585 micros/op 631099 ops/sec; (10000000 of 10000000 found)
readseq      :       0.054 micros/op 18570309 ops/sec; 2054.4 MB/s
readreverse  :       0.049 micros/op 20518207 ops/sec; 2269.9 MB/s

02Delta

fillrandsync   1.062   (6.2% speedup)
fillrandom     1.079
fillrandbatch  1.017
fillseqsync    1.065
fillseq        1.163
fillseqbatch   1.038
overwrite      1.080
readrandom     1.066
readseq        1.026
readreverse    1.047

Using gcc (Ubuntu/Linaro 4.7.3-1ubuntu1) 4.7.3