Add Compression Benchmark Scenario

[VikramAditya33]

Added compression benchmark scenario comparing Express, Fastify, and uWestJS

Closes #58

Summary by CodeRabbit

• Tests
  • Added benchmark scenario for compression functionality across supported frameworks.
  • Added performance testing script for gzip-compressed response scenarios.

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uWestJS Benchmark Results

Scenario	Express req/s	Fastify req/s	uWestJS req/s	Express throughput	Fastify throughput	uWestJS throughput	uWestJS vs Express	uWestJS vs Fastify
compression	6.08k	4.33k	FAILED	3.19 MB/s	2.22 MB/s	FAILED	N/A	N/A
headers	13.27k	19.52k	43.92k	2.47 MB/s	3.65 MB/s	6.91 MB/s	3.31x	2.25x
hello-world	13.62k	21.72k	51.04k	2.26 MB/s	3.64 MB/s	5.06 MB/s	3.75x	2.35x
json-response	12.76k	18.77k	39.86k	3.48 MB/s	5.14 MB/s	9.73 MB/s	3.12x	2.12x
mixed-response	12.83k	19.12k	35.68k	2.96 MB/s	4.43 MB/s	7.21 MB/s	2.78x	1.87x
post-json	12.70k	11.50k	21.72k	2.35 MB/s	3.14 MB/s	3.69 MB/s	1.71x	1.89x
query-params	11.40k	18.40k	44.32k	2.51 MB/s	4.07 MB/s	5.96 MB/s	3.89x	2.41x
route-params	12.99k	18.80k	37.43k	2.96 MB/s	4.30 MB/s	7.46 MB/s	2.88x	1.99x
static-file	15.73k	20.15k	37.08k	156.12 MB/s	199.76 MB/s	366.99 MB/s	2.36x	1.84x

[coderabbitai]

Actionable comments posted: 2

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Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@benchmarks/scenarios/compression.js`:
- Around line 29-32: The async route at app.get('/compress') calls
handler.compressBuffer without error handling; wrap the await
handler.compressBuffer(req, res, body) call in a local try/catch inside that
route handler (the function passed to app.get('/compress')), and on catch send a
controlled 500 response (e.g.,
res.status(500).setHeader('content-type','text/plain').send('Compression
failed') or similar) to avoid unhandled rejections and benchmark instability;
keep the existing success path (setHeader and res.send(compressed)) unchanged.
- Around line 11-33: The payload is precomputed as a Buffer only for uwestjs
which skews benchmarking; change to build a single shared Buffer (from payload)
once and use that Buffer for all frameworks: replace Express's string send in
the app.get('/compress') handler (used in the 'express' branch) to send the
prebuilt Buffer (keeping res.type('text/plain') and res.send(buffer)), and
replace Fastify's reply.send(payload) in the 'fastify' branch to
reply.send(buffer) (keep reply.type('text/plain') or equivalent), while leaving
the uwestjs CompressionHandler usage as-is (handler.compressBuffer should still
receive the buffer). Ensure the unique symbols payload, app.get('/compress'),
CompressionHandler, handler.compressBuffer, and reply.send are updated
accordingly.

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📥 Commits

Reviewing files that changed from the base of the PR and between 59e1498 and 30b209a.

📒 Files selected for processing (2)

• benchmarks/scenarios/compression.js
• benchmarks/wrk-scripts/compression.lua

[VikramAditya33]

Compression Failure is expected as #57 fix isn't at place. Will open a PR soon