fast-replace/bash-fast-replace/README.md

# Bash Fast Replace

An implementation in bash.

## Usage

To create the corpus.csv and pairs.csv files. And perform the replacements:

```shell
make install # create corpus and pairs
make run # create file with the replaced values
```

Then to test:

```shell
make test # Checks that the replacement worked
```


## Conclusions

`shuf` is amazing. Using /dev/urandom directly produces broken pipe errors on when using Make.

Speed is not great... But no surprize there.
````shell
$ make install
./bin/pairs.sh
Generating csv/pairs.csv...
The generation of 1000 pairs took 2s
./bin/corpus.sh
Generating csv/corpus.csv...
 generated in 3s

$ make run
./bin/replace.sh
Generating replaced.csv...
Replacement took 3s

$ make test
./bin/test.sh
test OK
````