Perf improvments (#3070)

Author: catalinaperalta

.chronus/changes/perf-improvements-2025-3-14-19-10-1.md

@@ -0,0 +1,7 @@
+---
+changeKind: fix
+packages:
+    - "@azure-tools/typespec-python"
+---
+
+Improve emitter performance by updating black plugin implementation.

packages/typespec-python/scripts/install.py

@@ -41,6 +41,7 @@ def main():
         venv_context = env_builder.context
 
         python_run(venv_context, "pip", ["install", "-U", "pip"])
+        python_run(venv_context, "pip", ["install", "-U", "black"])
 
 
 if __name__ == "__main__":

packages/typespec-python/scripts/run_tsp.py

@@ -7,7 +7,7 @@
 import venv
 import logging
 from pathlib import Path
-from pygen import preprocess, codegen, black
+from pygen import preprocess, codegen
 from pygen.utils import parse_args
 
 _ROOT_DIR = Path(__file__).parent.parent
@@ -38,4 +38,3 @@
     args, unknown_args = parse_args()
     preprocess.PreProcessPlugin(output_folder=args.output_folder, cadl_file=args.cadl_file, **unknown_args).process()
     codegen.CodeGenerator(output_folder=args.output_folder, cadl_file=args.cadl_file, **unknown_args).process()
-    black.BlackScriptPlugin(output_folder=args.output_folder, **unknown_args).process()