bug: Fix some performance regressions (#344)

Fixes some performance regressions and forgotten cleanup.

Changes to attempt to improve performance to match 0.4.x:

- Remove `trace!` and `--debug` for now.  These were a significant hog.  Removing this dropped initial memory usage by about half.
- Add additional cleaning step for `pid_mapping`  during process harvesting.  This should hopefully improve memory usage as time goes on.
- Slightly change how we do sorting to hopefully be a bit more optimal?  This was just an easy change to make that I spotted.
- Fix broken cleaning child thread task.

1 files changed, 0 insertions, 1 deletions

diff --git a/README.md b/README.md
index 32658739..22051656 100644
--- a/README.md
+++ b/README.md
@@ -222,7 +222,6 @@ Use `btm --help` for more information.
         --color <COLOR SCHEME>                 Use a color scheme, use --help for supported values.
     -C, --config <CONFIG PATH>                 Sets the location of the config file.
     -u, --current_usage                        Sets process CPU% to be based on current CPU%.
-        --debug                                Enables debug logging.
     -t, --default_time_value <MS>              Default time value for graphs in ms.
         --default_widget_count <INT>           Sets the n'th selected widget type as the default.
         --default_widget_type <WIDGET TYPE>    Sets which widget type to use as the default widget.