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README.md

@@ -1,5 +1,22 @@
-# bugexample
+# Example: Problem A
 
-[![CI](https://github.com//bugexample/workflows/CI/badge.svg)](https://github.com//bugexample/actions)
+Example for issue 649, Problem A
+[Issue](https://github.com/ratatui-org/ratatui/issues/649)
 
-Short example for issue 649
+## The program
+
+1. Reads new lines added to a file (specified in app.rs, Line 55)
+2. Sends new lines to the app @ home.rs (->`Action::IONotify`)
+3. App parses lines into styled contents and renders a list of styled lines 
+
+To use the program change Line 55 in app.rs to point to the text.txt included in this repo. 
+Do `cargo run` and copy+paste a line in the text.txt file and save it.
+
+## Recap of Problem A
+
+When doing the above with this branch you can watch the CPU usage increase with each line added.
+This problem mostly boils down to really inefficient placement of the regex constructor being used to color a word in a given string.
+Which led to me looking in all the wrong for the issue at first.
+
+This emphasizes however, that in parsing large lists one may want to precalculate the styles when a new string is received from the file watcher.
+This brings us to Problem B [B](https://github.com/J-Bockhofer/rs-ratatui-i649/tree/problemB)