- Create the function, in the utils package, limited_string that allows you to truncate a string based on a
delimiter (May break the encoding of the character where it was cut)
- Create tests for limited_string function
- Add support for -y and --side-by-side flags that enables diff output for side-by-side mode
- Create implementation of the diff -y (SideBySide) command, base command for sdiff, using the crate
diff as engine. Currently it does not fully represent GNU diff -y, some flags (|, (, ), , /) could
not be developed due to the limitation of the engine we currently use (crate diff), which did not
allow perform logic around it. Only the use of '<' and '>' were enabled.
- Create tests for SideBySide implementation
The utility should support all the arguments supported by GNU cmp and
perform slightly better.
On a "bad" scenario, ~36M files which are completely different, our
version runs in ~72% of the time of the original on my M1 Max:
> hyperfine --warmup 1 -i --output=pipe \
'cmp -l huge huge.3'
Benchmark 1: cmp -l huge huge.3
Time (mean ± σ): 3.237 s ± 0.014 s [User: 2.891 s, System: 0.341 s]
Range (min … max): 3.221 s … 3.271 s 10 runs
Warning: Ignoring non-zero exit code.
> hyperfine --warmup 1 -i --output=pipe \
'../target/release/diffutils cmp -l huge huge.3'
Benchmark 1: ../target/release/diffutils cmp -l huge huge.3
Time (mean ± σ): 2.392 s ± 0.009 s [User: 1.978 s, System: 0.406 s]
Range (min … max): 2.378 s … 2.406 s 10 runs
Warning: Ignoring non-zero exit code.
Our cmp runs in ~116% of the time when comparing libxul.so to the
chromium-browser binary with -l and -b. In a best case scenario of
comparing 2 files which are the same except for the last byte, our
tool is slightly faster.
Sami Daniel