Benchmark

Batch renaming of 1000 files from Nomino (2020) S5.E$e.1080p.mkv to $e.mkv.

Environment

• Os: Linux 5.6.4 x86_64
• Memory: 12 GiB
• CPU: Intel® Core™ i7-4500U CPU @ 1.80GHz × 4
• Disk: Samsung SSD EVO-850
• Tool: hyperfine

Result

Tool	Language	Time (ms)	User (ms)	System (ms)
nomino	Rust	7.3	3.1	4.4
brename	Go	19.1	8.2	12.6
rnm	C++	37.8	24.9	12.6
rnr	Rust	35.9	14.6	21.0
rename	Perl	44.4	36.4	7.8
node-rename-cli	Javascript	274.2	329.2	30.0

lower value is better

Prepare

➜  cat prepare-script.sh
rm -f *.mkv
for i in {1..1000}; do touch "Nomino (2020) S5.E$i.1080p.mkv"; done

Tests

• nomino

➜  hyperfine -p "prepare-script.sh" 'nomino -r ".*E(\d+).*" "{}.mkv"'       
Benchmark #1: nomino -r ".*E(\d+).*" "{}.mkv"
  Time (mean ± σ):       7.3 ms ±   0.6 ms    [User: 3.1 ms, System: 4.4 ms]
  Range (min … max):     6.7 ms …   8.4 ms    10 runs

• brename

➜  hyperfine -p "prepare-script.sh" './brename -p ".*E(\d+).*" -r \$1.mkv -q'
Benchmark #1: ./brename -p ".*E(\d+).*" -r \$1.mkv -q
  Time (mean ± σ):      19.1 ms ±   0.6 ms    [User: 8.2 ms, System: 12.6 ms]
  Range (min … max):    18.0 ms …  19.9 ms    10 runs

• rnm

➜  hyperfine -p "prepare-script.sh" 'rnm -q -rs "/.*E(\d+).*$/\1.mkv/" *.mkv'
Benchmark #1: rnm -q -rs "/.*E(\d+).*$/\1.mkv/" *.mkv
  Time (mean ± σ):      37.8 ms ±   1.6 ms    [User: 24.9 ms, System: 12.6 ms]
  Range (min … max):    36.0 ms …  41.7 ms    10 runs

• rnr

➜  hyperfine -p "prepare-script.sh" 'rnr -sf ".*E(\d+).*" "\$1.mkv" *.mkv'                    
Benchmark #1: rnr -sf ".*E(\d+).*" "\$1.mkv" *.mkv
  Time (mean ± σ):      35.9 ms ±   1.3 ms    [User: 14.6 ms, System: 21.0 ms]
  Range (min … max):    34.1 ms …  38.0 ms    10 runs

• rename

➜  hyperfine -p "prepare-script.sh" 'rename "s/.*E(\d+).*$/\$1.mkv/" *.mkv'
Benchmark #1: perl-rename "s/.*E(\d+).*$/\$1.mkv/" *.mkv
  Time (mean ± σ):      44.4 ms ±   1.0 ms    [User: 36.4 ms, System: 7.8 ms]
  Range (min … max):    43.3 ms …  46.8 ms    10 runs

• node-rename-cli

➜  hyperfine -p "prepare-script.sh" 'rname -n -f -r ".*E(?<episode>\d+).*" *.mkv "{{episode}}.mkv"'
Benchmark #1: rname -n -f -r ".*E(?<episode>\d+).*" *.mkv "{{episode}}.mkv"
  Time (mean ± σ):     274.2 ms ±   9.9 ms    [User: 329.2 ms, System: 30.0 ms]
  Range (min … max):   262.0 ms … 297.8 ms    10 runs