This dropped RSS (memory usage) from 4GB to 1.5GB when compiling.
The extra `match` could impact performance but not too concerned since
the default is to not look within vars.
This is mostly to give implementation flexibility for changing out how
we store the data to reduce compilation memory usage.
This does have performance impact, jumping from ~220ns to ~320ns for a
dict lookup, according to our micro benchmarks.
When rendering typos, we look up what visual column the typoe starts on
but I mixed a raw byte offset with the offset into a lossy string. This
caused panics when dealing with non-ascii content.
Fixes#258
I didn't count on how `buffer.lines().count()` would handle different
corner cases, like slices with no `\n`, slices with trailing `\n`, etc.
Fixes#259
We want both CLI and config ignores. The question then is what we make
them relative to. I decided to favor CLI with `.`. We'll see how this
works out
Fixes#134
Variant support slows us down by 10-50$. I assume most people will run
with `en` and so most of this overhead is to waste. So instead of
merging vars with dict, let's instead get a quick win by just skipping
vars when we don't need to. If the assumptions behind this change over
time or if there is need for speeding up a specific locale, we can
re-address this.
Before:
```
check_file/Typos/code time: [35.860 us 36.021 us 36.187 us]
thrpt: [8.0117 MiB/s 8.0486 MiB/s 8.0846 MiB/s]
check_file/Typos/corpus time: [26.966 ms 27.215 ms 27.521 ms]
thrpt: [21.127 MiB/s 21.365 MiB/s 21.562 MiB/s]
```
After:
```
check_file/Typos/code time: [33.837 us 33.928 us 34.031 us]
thrpt: [8.5191 MiB/s 8.5452 MiB/s 8.5680 MiB/s]
check_file/Typos/corpus time: [17.521 ms 17.620 ms 17.730 ms]
thrpt: [32.794 MiB/s 32.999 MiB/s 33.184 MiB/s]
```
This puts us inline with `--no-default-features --features dict`
Fixes#253
