📄 13% (0.13x) speedup for _apply_bearer_authorization_override in src/deepgram/client.py

⏱️ Runtime : 22.1 microseconds → 19.5 microseconds (best of 41 runs)

📝 Explanation and details

Impact: low
Impact_explanation: Looking at the optimization details:

Performance Analysis:

• Original runtime: 22.1μs, Optimized runtime: 19.5μs
• Speedup: 13.15% with 100% test coverage
• The function runs in microsecond range (< 100μs), indicating minor improvement potential

Test Results:

• existing_tests: Single test shows 11.2% speedup (5.71μs → 5.13μs)
• replay_tests: Single test shows 13.9% speedup (16.4μs → 14.4μs)
• Both tests show consistent improvements above 10%

Hot Path Assessment:
The calling function details show _apply_bearer_authorization_override is called in the __init__ method of what appears to be DeepgramClient classes. This is called during client initialization when an access token is provided. While this is not in a tight loop, it's part of the initialization process for API clients.

Technical Merit:
The optimization eliminates types.MethodType overhead by using a direct closure assignment, which is a clean and meaningful improvement that removes unnecessary method binding complexity.

Assessment:
While the absolute runtime is small (< 100μs), the optimization shows:

1. Consistent 11-14% speedups across tests
2. Good technical approach eliminating unnecessary overhead
3. 100% test coverage
4. Called during client initialization (moderate frequency)

The speedup percentage (>10%) combined with consistent improvements across tests and the fact it's in a client initialization path makes this a reasonable optimization, though not highly impactful due to the small absolute runtimes.

END OF IMPACT EXPLANATION

The optimization eliminates the overhead of types.MethodType binding by directly assigning the closure function to the method attribute.

Key Change:

• Original: Used types.MethodType(_get_headers_with_bearer, client_wrapper) to create a bound method
• Optimized: Directly assigned the closure _get_headers_with_bearer without method binding

Why This is Faster:
The types.MethodType constructor creates additional overhead by:

1. Instantiating a method object that binds the function to the instance
2. Managing the method's __self__ attribute and descriptor protocol
3. Adding an extra layer of indirection when the method is called

The optimized version removes this overhead by:

• Eliminating the types.MethodType call (saving ~4.3μs based on line profiler data: 8105ns vs 1009ns per hit)
• Using a simple closure that captures the necessary context directly
• Reducing the method assignment from a bound method creation to a simple function assignment

Performance Profile:
The line profiler shows the method binding line dropped from 13.1% of total time to 7.1% of total time, indicating this specific optimization accounts for most of the 13% speedup. This optimization is particularly effective for scenarios where _apply_bearer_authorization_override is called frequently during client initialization or token refresh operations.

✅ Correctness verification report:

To edit these changes git checkout codeflash/optimize-_apply_bearer_authorization_override-mgusy8my and push.