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Bool writer like reader #118

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Bool writer like reader #118

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Melirius
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Making use of known bit lengths we can reduce number of low_value flush tests and provide performance improvement.

This PR:

2024-11-21T17:57:59.491Z INFO  [lepton_jpeg::structs::lepton_file_writer] compressing to Lepton format
2024-11-21T17:57:59.957Z INFO  [lepton_jpeg::structs::lepton_file_writer] Number of threads: 8
2024-11-21T17:58:01.172Z INFO  [lepton_jpeg::structs::lepton_file_writer] worker threads 8267ms of CPU time in 1213ms of wall time
2024-11-21T17:58:01.172Z INFO  [lepton_jpeg::structs::lepton_file_writer] decompressing to verify contents
2024-11-21T17:58:02.767Z INFO  [lepton_jpeg_util] compressed input 22171278, output 17324074 bytes (compression = 28.0%)
2024-11-21T17:58:02.767Z INFO  [lepton_jpeg_util] Main thread CPU: 3275ms, Worker thread CPU: 19316 ms, walltime: 3275 ms

 Performance counter stats for 'taskset -c 10 nice -n -20 target/release/lepton_jpeg_util images/img_52MP_7k.jpg images/img_52MP_7k2.lep':

       846 331 521      cache-references                                                        (41,79%)
        79 315 801      cache-misses                     #    9,37% of all cache refs           (41,85%)
    14 764 047 286      cycles                                                                  (41,94%)
       932 581 537      ic_fetch_stall.ic_stall_back_pressure                                        (41,93%)
     1 011 815 567      stalled-cycles-frontend          #    6,85% frontend cycles idle        (42,02%)
    36 784 577 922      instructions                     #    2,49  insn per cycle            
                                                  #    0,03  stalled cycles per insn     (42,22%)
     4 312 566 577      branch-instructions                                                     (42,19%)
       158 545 838      branch-misses                    #    3,68% of all branches             (42,14%)
     5 065 300 912      ic_fetch_stall.ic_stall_any                                             (41,99%)
        40 037 609      ic_fetch_stall.ic_stall_dq_empty                                        (41,67%)
        66 558 200      l2_cache_misses_from_ic_miss                                            (41,57%)
     2 040 840 392      l2_latency.l2_cycles_waiting_on_fills                                        (41,56%)
           182 998      faults                                                                
                 1      migrations                                                            

       3,309236918 seconds time elapsed

       3,009823000 seconds user
       0,294591000 seconds sys

main

2024-11-21T17:56:45.765Z INFO  [lepton_jpeg::structs::lepton_file_writer] compressing to Lepton format
2024-11-21T17:56:46.236Z INFO  [lepton_jpeg::structs::lepton_file_writer] Number of threads: 8
2024-11-21T17:56:47.456Z INFO  [lepton_jpeg::structs::lepton_file_writer] worker threads 8295ms of CPU time in 1219ms of wall time
2024-11-21T17:56:47.456Z INFO  [lepton_jpeg::structs::lepton_file_writer] decompressing to verify contents
2024-11-21T17:56:49.053Z INFO  [lepton_jpeg_util] compressed input 22171278, output 17324074 bytes (compression = 28.0%)
2024-11-21T17:56:49.053Z INFO  [lepton_jpeg_util] Main thread CPU: 3288ms, Worker thread CPU: 19384 ms, walltime: 3288 ms

 Performance counter stats for 'taskset -c 10 nice -n -20 target/release/lepton_jpeg_util images/img_52MP_7k.jpg images/img_52MP_7k2.lep':

       862 881 575      cache-references                                                        (41,81%)
        75 491 793      cache-misses                     #    8,75% of all cache refs           (41,82%)
    14 923 123 147      cycles                                                                  (41,78%)
       768 707 879      ic_fetch_stall.ic_stall_back_pressure                                        (41,89%)
       979 668 407      stalled-cycles-frontend          #    6,56% frontend cycles idle        (41,89%)
    37 907 138 544      instructions                     #    2,54  insn per cycle            
                                                  #    0,03  stalled cycles per insn     (41,86%)
     4 237 299 015      branch-instructions                                                     (41,93%)
       150 601 797      branch-misses                    #    3,55% of all branches             (41,89%)
     5 258 215 965      ic_fetch_stall.ic_stall_any                                             (41,84%)
        35 478 851      ic_fetch_stall.ic_stall_dq_empty                                        (41,97%)
        61 239 992      l2_cache_misses_from_ic_miss                                            (41,97%)
     1 945 145 590      l2_latency.l2_cycles_waiting_on_fills                                        (41,83%)
           182 871      faults                                                                
                 1      migrations                                                            

       3,331041940 seconds time elapsed

       2,981193000 seconds user
       0,346673000 seconds sys

Like reader it reduces the number of value tests
@Melirius
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Rebased

Melirius added a commit that referenced this pull request Nov 23, 2024
The same performance as "Bool writer like reader #118"
@Melirius Melirius mentioned this pull request Nov 23, 2024
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