benchmark: fastgather vs fastmultigather vs fastmultigather x rocksdb

[ctb]

chill-filter benchmarks

rocksdb still fastest!

fastgather

        Command being timed: "sourmash scripts fastgather ERR1395610.k51.s100_000.sig.zip ../prepare-db/plants+animals+gtdb.mf.csv -k 51 --scaled 100_000 -o xxx.csv"
        User time (seconds): 19.72
        System time (seconds): 1.16
        Percent of CPU this job got: 130%
        Elapsed (wall clock) time (h:mm:ss or m:ss): 0:16.02
        Average shared text size (kbytes): 0
        Average unshared data size (kbytes): 0
        Average stack size (kbytes): 0
        Average total size (kbytes): 0
        Maximum resident set size (kbytes): 1018504
        Average resident set size (kbytes): 0
        Major (requiring I/O) page faults: 0
        Minor (reclaiming a frame) page faults: 360633
        Voluntary context switches: 37
        Involuntary context switches: 660
        Swaps: 0
        File system inputs: 0
        File system outputs: 8
        Socket messages sent: 0
        Socket messages received: 0
        Signals delivered: 0
        Page size (bytes): 4096
        Exit status: 0

fastmultigather

        Command being timed: "sourmash scripts fastmultigather ERR1395610.k51.s100_000.sig.zip ../prepare-db/plants+animals+gtdb.mf.csv -k 51 --scaled 100_000"
        User time (seconds): 18.57
        System time (seconds): 1.17
        Percent of CPU this job got: 127%
        Elapsed (wall clock) time (h:mm:ss or m:ss): 0:15.43
        Average shared text size (kbytes): 0
        Average unshared data size (kbytes): 0
        Average stack size (kbytes): 0
        Average total size (kbytes): 0
        Maximum resident set size (kbytes): 996920
        Average resident set size (kbytes): 0
        Major (requiring I/O) page faults: 1
        Minor (reclaiming a frame) page faults: 402592
        Voluntary context switches: 51
        Involuntary context switches: 765
        Swaps: 0
        File system inputs: 128
        File system outputs: 16
        Socket messages sent: 0
        Socket messages received: 0
        Signals delivered: 0
        Page size (bytes): 4096
        Exit status: 0

fastmultigather x rocksdb

        User time (seconds): 7.78
       System time (seconds): 2.20
       Percent of CPU this job got: 100%
       Elapsed (wall clock) time (h:mm:ss or m:ss): 0:09.90
       Average shared text size (kbytes): 0
       Average unshared data size (kbytes): 0
       Average stack size (kbytes): 0
       Average total size (kbytes): 0
       Maximum resident set size (kbytes): 1272924
       Average resident set size (kbytes): 0
       Major (requiring I/O) page faults: 0
       Minor (reclaiming a frame) page faults: 848997
       Voluntary context switches: 99
       Involuntary context switches: 367
       Swaps: 0
       File system inputs: 0
       File system outputs: 0
       Socket messages sent: 0
       Socket messages received: 0
       Signals delivered: 0
       Page size (bytes): 4096
       Exit status: 0
      ```