chgk_ledb/bench.txt

866 MB db/data.mdb
233 MB test.bin
 95 MB json.zip
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hyperfine  -n print -n print2 -n zip-print -w 100 -m 100 ".\target\release\chgk_ledb.exe print 444" ".\target\release\chgk_ledb.exe print2 444" ".\target\release\chgk_ledb.exe zip-print 4 84"

Benchmark 1: print
  Time (mean ± σ):      16.9 ms ±   5.0 ms    [User: 5.5 ms, System: 13.4 ms]
  Range (min … max):    14.5 ms …  65.1 ms    107 runs

Benchmark 2: print2
  Time (mean ± σ):      16.4 ms ±   5.2 ms    [User: 4.9 ms, System: 13.2 ms]
  Range (min … max):    13.9 ms …  67.5 ms    110 runs

Benchmark 3: zip-print
  Time (mean ± σ):      38.3 ms ±   7.4 ms    [User: 13.5 ms, System: 22.1 ms]
  Range (min … max):    32.8 ms …  91.7 ms    100 runs

Summary
  'print2' ran
    1.04 ± 0.45 times faster than 'print'
    2.35 ± 0.87 times faster than 'zip-print'