refactor: Another small optimization pass (#350)

Making some small changes that would hopefully improve performance a bit.

- Remove redundant string generations for CPU data conversion
- Switch to fnv for PID hashmap and hashsets
- Use buffered reading to avoid having to store too many lines as strings

1 files changed, 6 insertions, 2 deletions

diff --git a/src/bin/main.rs b/src/bin/main.rs
index 8e143a39..320b100a 100644
--- a/src/bin/main.rs
+++ b/src/bin/main.rs
@@ -215,8 +215,12 @@ fn main() -> Result<()> {
 
                         if app.used_widgets.use_cpu {
                             // CPU
-                            app.canvas_data.cpu_data =
-                                convert_cpu_data_points(&app.data_collection, false);
+
+                            convert_cpu_data_points(
+                                &app.data_collection,
+                                &mut app.canvas_data.cpu_data,
+                                false,
+                            );
                         }
 
                         // Processes