Improve performance and add profiling tooling

Add tags, todo, *.bench, *.svg and bench_output to .gitignore

Add test/bench.sh script. bench.sh runs the `bench` command on each
test/long*txt file with range 3:5 and saves the output to a file for
comparing performance across file sizes.

Inline printing in get_choice_slice

Change BufWriter<..stdout..> to BufWriter<T>

Add MockStdout for testing printing

Add more reverse range tests

Simplify word finding with a more uniform bounds check.

Add Makefile for generating flamegraphs

Redefine Choice struct as a start and end integer

Improve algorithm for finding words to print

Settle exclusivity at Config construction time

Add tests for nonexistant field_seps

Add regression test for preceding separator

Use handle.write instead of write! macro for tremendous speed up

1 files changed, 10 insertions, 0 deletions

diff --git a/test/bench.sh b/test/bench.sh
new file mode 100755
index 0000000..53160b1
--- /dev/null
+++ b/test/bench.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+cargo build --release # always be up to date
+output="bench_output"
+mkdir -p $output
+inputs=($(find test -name "long*txt" | sort -r))
+for i in {0..4}
+do
+  echo ${inputs[$i]}
+  bench "target/release/choose 3:5 -i ${inputs[$i]}"  > $output/$1$i.bench
+done