perf(websocket): avoid toLowerCase call

[tsctx]

No description provided.

[codecov-commenter]

Codecov Report

Attention: 157 lines in your changes are missing coverage. Please review.

Comparison is base (e39a632) 85.54% compared to head (0d5a0bd) 84.64%.
Report is 175 commits behind head on main.

Files	Patch %	Lines
lib/fetch/index.js	67.29%	52 Missing ⚠️
lib/fetch/util.js	34.66%	49 Missing ⚠️
lib/handler/RetryHandler.js	74.35%	30 Missing ⚠️
lib/api/readable.js	88.88%	5 Missing ⚠️
lib/compat/dispatcher-weakref.js	28.57%	5 Missing ⚠️
lib/fetch/headers.js	90.19%	5 Missing ⚠️
lib/client.js	93.44%	4 Missing ⚠️
lib/core/util.js	95.55%	2 Missing ⚠️
lib/fetch/request.js	92.00%	2 Missing ⚠️
lib/core/request.js	98.21%	1 Missing ⚠️
... and 2 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2550      +/-   ##
==========================================
- Coverage   85.54%   84.64%   -0.91%     
==========================================
  Files          76       80       +4     
  Lines        6858     7240     +382     
==========================================
+ Hits         5867     6128     +261     
- Misses        991     1112     +121     

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[KhafraDev]

Handshake performance doesn't matter because you rarely connect to a websocket server (lpinca mentioned this to me when I implemented websocket). This is optimizing (is it?) for a very, very cold path.

[tsctx]

Thanks for the explanation. I agree with you.