- optimised main emulator loop, allowing updates only once every roughly 32,000 instructions.

- optimised memory access patterns, removing unecessary mutability and accesses.
- replaced the standard HashMap with an implementation that uses a faster hashing algorithm.

results:

before:
    - our benchmark program with ~4m instructions would take around for their data to make it to the UI, and a bit over 200ms to actually run

after:
    - our benchmark program with ~4m instructions can run in around 75ms, and the UI receives the update almost instantly.

conclusion:
- emulator performance should be around 2-3x faster than before.

emulator/Cargo.toml

@@ -19,10 +19,11 @@ assembler = { path = "../assembler" }
 dsa_editor = { path = "../dsa_editor" }
 egui = "0.31.1"
 dirs = "6.0.0"
-discord-presence = { version = "1.6.0", optional = true }
+discord-presence = { version = "2.0.0", optional = true }
 toml = { version = "0.8.23", optional = true }
 serde = { version = "1.0.219", features = ["derive"], optional = true }
 egui_file = "0.22.1"
+rustc-hash = "2.1.1"
 
 [features]
 default = ["config"]