src: improve TextEncoder encodeInto performance

[anonrig]

Improves the performance of TextEncoder.encodeInto method

Benchmark CI: https://ci.nodejs.org/view/Node.js%20benchmark/job/benchmark-node-micro-benchmarks/1709/

It seems none of the benchmarks are triggering the fast path

14:13:35                                                                                confidence improvement accuracy (*)   (**)  (***)
14:13:35 util/text-encoder.js op='encode' type='ascii' n=1000000 len=1024                              -0.36 %       ±1.01% ±1.35% ±1.76%
14:13:35 util/text-encoder.js op='encode' type='ascii' n=1000000 len=256                                0.04 %       ±1.82% ±2.43% ±3.17%
14:13:35 util/text-encoder.js op='encode' type='ascii' n=1000000 len=32                                -0.33 %       ±0.87% ±1.16% ±1.52%
14:13:35 util/text-encoder.js op='encode' type='ascii' n=1000000 len=8192                               0.01 %       ±0.34% ±0.45% ±0.58%
14:13:35 util/text-encoder.js op='encode' type='one-byte-string' n=1000000 len=1024                    -0.56 %       ±0.62% ±0.82% ±1.07%
14:13:35 util/text-encoder.js op='encode' type='one-byte-string' n=1000000 len=256                     -0.17 %       ±0.85% ±1.13% ±1.48%
14:13:35 util/text-encoder.js op='encode' type='one-byte-string' n=1000000 len=32                       0.84 %       ±1.03% ±1.37% ±1.78%
14:13:35 util/text-encoder.js op='encode' type='one-byte-string' n=1000000 len=8192              *      0.07 %       ±0.06% ±0.07% ±0.10%
14:13:35 util/text-encoder.js op='encode' type='two-byte-string' n=1000000 len=1024            ***     -2.76 %       ±0.49% ±0.65% ±0.85%
14:13:35 util/text-encoder.js op='encode' type='two-byte-string' n=1000000 len=256                      0.58 %       ±0.71% ±0.94% ±1.22%
14:13:35 util/text-encoder.js op='encode' type='two-byte-string' n=1000000 len=32                      -0.39 %       ±0.78% ±1.03% ±1.35%
14:13:35 util/text-encoder.js op='encode' type='two-byte-string' n=1000000 len=8192            ***     -4.32 %       ±0.12% ±0.16% ±0.21%
14:13:35 util/text-encoder.js op='encodeInto' type='ascii' n=1000000 len=1024                  ***     -4.49 %       ±0.51% ±0.68% ±0.88%
14:13:35 util/text-encoder.js op='encodeInto' type='ascii' n=1000000 len=256                   ***     -4.55 %       ±0.80% ±1.08% ±1.41%
14:13:35 util/text-encoder.js op='encodeInto' type='ascii' n=1000000 len=32                    ***     -6.35 %       ±1.21% ±1.61% ±2.09%
14:13:35 util/text-encoder.js op='encodeInto' type='ascii' n=1000000 len=8192                   **     -1.86 %       ±1.27% ±1.69% ±2.20%
14:13:35 util/text-encoder.js op='encodeInto' type='one-byte-string' n=1000000 len=1024        ***     -0.51 %       ±0.26% ±0.35% ±0.45%
14:13:35 util/text-encoder.js op='encodeInto' type='one-byte-string' n=1000000 len=256         ***     -1.14 %       ±0.24% ±0.32% ±0.42%
14:13:35 util/text-encoder.js op='encodeInto' type='one-byte-string' n=1000000 len=32                  -0.71 %       ±0.99% ±1.31% ±1.71%
14:13:35 util/text-encoder.js op='encodeInto' type='one-byte-string' n=1000000 len=8192        ***     -0.35 %       ±0.04% ±0.05% ±0.07%
14:13:35 util/text-encoder.js op='encodeInto' type='two-byte-string' n=1000000 len=1024                -0.32 %       ±0.34% ±0.45% ±0.58%
14:13:35 util/text-encoder.js op='encodeInto' type='two-byte-string' n=1000000 len=256                 -0.22 %       ±0.24% ±0.32% ±0.41%
14:13:35 util/text-encoder.js op='encodeInto' type='two-byte-string' n=1000000 len=32          ***     -3.57 %       ±1.10% ±1.47% ±1.92%
14:13:35 util/text-encoder.js op='encodeInto' type='two-byte-string' n=1000000 len=8192        ***      0.92 %       ±0.20% ±0.26% ±0.34%

[codecov]

Codecov Report

Attention: Patch coverage is 17.39130% with 19 lines in your changes missing coverage. Please review.

Project coverage is 90.21%. Comparing base (a36981a) to head (635769a).
Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
src/encoding_binding.cc	17.39%	19 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #58080      +/-   ##
==========================================
- Coverage   90.21%   90.21%   -0.01%     
==========================================
  Files         630      630              
  Lines      186391   186420      +29     
  Branches    36608    36611       +3     
==========================================
+ Hits       168161   168170       +9     
- Misses      11052    11070      +18     
- Partials     7178     7180       +2     

Files with missing lines	Coverage Δ
src/encoding_binding.h	100.00% <ø> (ø)
src/node_external_reference.h	100.00% <ø> (ø)
src/encoding_binding.cc	72.36% <17.39%> (-7.30%)	⬇️

... and 31 files with indirect coverage changes

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