buffer: cache Environment::GetCurrent to avoid repeated calls

[mertcanaltin]

cache Environment::GetCurrent to avoid repeated calls

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 90.07%. Comparing base (049664b) to head (f444c8e).

Files with missing lines	Patch %	Lines
src/node_buffer.cc	33.33%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #59043   +/-   ##
=======================================
  Coverage   90.06%   90.07%           
=======================================
  Files         645      645           
  Lines      189130   189131    +1     
  Branches    37094    37089    -5     
=======================================
+ Hits       170339   170353   +14     
+ Misses      11511    11480   -31     
- Partials     7280     7298   +18     

Files with missing lines	Coverage Δ
src/node_buffer.cc	68.83% <33.33%> (+0.03%)	⬆️

... and 34 files with indirect coverage changes

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[dario-piotrowicz]

I wonder if the commit message should mention buffer (or the specific buffer API this change is affecting) somewhere 🤔

[mertcanaltin]

I wonder if the commit message should mention buffer (or the specific buffer API this change is affecting) somewhere 🤔

As you said, I think it would be correct to mention the buffer in the commit message
Thanks for the suggestion! I Updated the commit message.