Defer fractions.Fraction import to save 5ms

[hugovk]

main

PR

hyperfine

❯ hyperfine --warmup 32 \
--prepare "git checkout defer-fractions" 'python3 -c "import humanize # PR"' \
--prepare "git checkout main"            'python3 -c "import humanize # main"'
Benchmark 1: python3 -c "import humanize # PR"
  Time (mean ± σ):      46.1 ms ±  10.7 ms    [User: 34.4 ms, System: 8.5 ms]
  Range (min … max):    39.6 ms …  95.3 ms    55 runs

  Warning: Statistical outliers were detected. Consider re-running this benchmark on a quiet system without any interferences from other programs.

Benchmark 2: python3 -c "import humanize # main"
  Time (mean ± σ):      52.7 ms ±  16.7 ms    [User: 38.8 ms, System: 9.1 ms]
  Range (min … max):    41.7 ms … 118.4 ms    46 runs

Summary
  python3 -c "import humanize # PR" ran
    1.14 ± 0.45 times faster than python3 -c "import humanize # main"