http-kit: add Clojure framework

[Ramblurr]

Description

Adds the http-kit Clojure framework.

---

PR Commands — comment on this PR to trigger (requires collaborator approval):

Command	Description
/benchmark -f <framework>	Run every test the framework subscribes to
/benchmark -f <framework> -t <test>	Run one test only
/benchmark -f <framework> --save	Run and save results (updates the leaderboard on merge)
/benchmark -f <framework> -t <test> --save	Run one test and save results
/benchmark -f <framework> --compare <other>	Measure the deltas against another framework instead of this one
/benchmark-multiple -f <fw1>,<fw2>,...	Benchmark several frameworks in one run — takes -t and --save too; saved results land in a single commit
/benchmark-multiple --save	No -f needed: benchmark and save every framework the PR touches
/benchmark-test -t <test>	Benchmark all enabled frameworks subscribed to <test> and save the results

For /benchmark, always specify -f <framework>; the flags combine in any order. Results come back as a comment with a per-profile table of RPS, p99, CPU and memory — one table per framework on multi runs. A new benchmark comment while a run is in flight queues behind it (one deep) instead of cancelling it. For multi-framework PRs (dependency bumps, same-language refactors) prefer /benchmark-multiple, which runs everything in a single job and commits all saved results together, so no run overwrites another. --compare works on single-framework runs only.

What the deltas are measured against. By default, this framework's own results published on main - answering "did this change help?". When you are tuning a variant or a successor entry, --compare re-bases them on another entry instead:

/benchmark -f genhttp-11 --compare genhttp

The reply states which baseline it used, and profiles the other framework does not run show n/a rather than a delta.

---

Run benchmarks locally

You can validate and benchmark your framework locally with the lite script — no CPU pinning, fixed connection counts, all load generators run in Docker.

./scripts/validate.sh <framework>
./scripts/benchmark-lite.sh <framework> baseline
./scripts/benchmark-lite.sh --load-threads 4 <framework>

Requirements: Docker Engine on Linux. Load generators (gcannon, h2load, h2load-h3, wrk, ghz) are built as self-contained Docker images on first run.

[MDA2AV]

/benchmark -f http-kit --save

[github-actions]

👋 Benchmark request received. A collaborator will review and approve the run.

[github-actions]

Benchmark Results

Framework: http-kit | Test: all tests

Test	Conn	RPS	CPU	Mem	Δ RPS	Δ Mem
baseline	512	157,646	520.9%	1.8GiB	~0%	~0%
baseline	4096	154,873	518.4%	2.0GiB	~0%	~0%
pipelined	512	287,743	804.4%	1.0GiB	~0%	~0%
pipelined	4096	294,008	800.0%	1.1GiB	~0%	~0%
limited-conn	512	114,067	417.5%	1.5GiB	~0%	~0%
limited-conn	4096	113,158	414.0%	1.5GiB	~0%	~0%
json	4096	87,746	6201.6%	2.3GiB	~0%	~0%
json-comp	512	44,557	6242.7%	3.3GiB	~0%	~0%
json-comp	4096	46,074	6345.7%	3.9GiB	~0%	~0%
json-comp	16384	43,836	6234.8%	4.0GiB	~0%	~0%
upload	32	288	132.4%	4.7GiB	~0%	~0%
upload	256	242	149.6%	9.1GiB	~0%	~0%
static	1024	102,853	1751.4%	2.7GiB	~0%	~0%
static	4096	98,271	1719.2%	2.5GiB	~0%	~0%
static	6800	99,956	1653.4%	2.8GiB	~0%	~0%
async-db	1024	56,713	6445.6%	3.0GiB	~0%	~0%

Full log

[info] server ready

[run 1/3]
Running 5s test @ http://localhost:8080
  64 threads and 4096 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency     8.90ms    9.42ms 284.35ms   95.75%
    Req/Sec     3.03k     2.49k   12.19k    71.70%
  474855 requests in 5.10s, 28.20GB read
  Socket errors: connect 0, read 0, write 0, timeout 196
Requests/sec:  93103.31
Transfer/sec:      5.53GB
[info] CPU 2296.8% | Mem 2.5GiB

[run 2/3]
Running 5s test @ http://localhost:8080
  64 threads and 4096 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    38.74ms  154.76ms   1.70s    96.81%
    Req/Sec     2.36k     1.97k   13.25k    72.89%
  501204 requests in 5.10s, 29.76GB read
  Socket errors: connect 0, read 0, write 0, timeout 118
Requests/sec:  98271.73
Transfer/sec:      5.84GB
[info] CPU 1719.2% | Mem 2.5GiB

[run 3/3]
Running 5s test @ http://localhost:8080
  64 threads and 4096 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    54.15ms  169.01ms   1.81s    96.34%
    Req/Sec     1.70k     0.99k   12.47k    64.26%
  479341 requests in 5.10s, 28.47GB read
  Socket errors: connect 0, read 0, write 0, timeout 110
Requests/sec:  93978.54
Transfer/sec:      5.58GB
[info] CPU 1567.6% | Mem 3.0GiB

=== Best: 98271 req/s (CPU: 1719.2%, Mem: 2.5GiB) ===
[info] saved results/static/4096/http-kit.json
httparena-bench-http-kit
httparena-bench-http-kit

==============================================
=== http-kit / static / 6800c (tool=wrk) ===
==============================================
[info] waiting for server...
[info] server ready

[run 1/3]
Running 5s test @ http://localhost:8080
  64 threads and 6800 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    11.16ms   10.17ms 286.84ms   95.90%
    Req/Sec     2.76k     2.45k   16.59k    80.33%
  468538 requests in 5.10s, 27.82GB read
Requests/sec:  91870.09
Transfer/sec:      5.46GB
[info] CPU 1903.5% | Mem 2.3GiB

[run 2/3]
Running 5s test @ http://localhost:8080
  64 threads and 6800 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    21.98ms   81.37ms   1.83s    98.66%
    Req/Sec     2.75k     2.60k   10.93k    79.02%
  491011 requests in 5.10s, 29.16GB read
Requests/sec:  96269.89
Transfer/sec:      5.72GB
[info] CPU 1666.1% | Mem 2.8GiB

[run 3/3]
Running 5s test @ http://localhost:8080
  64 threads and 6800 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    15.79ms   23.43ms 941.93ms   99.43%
    Req/Sec     2.69k     2.73k   12.69k    80.23%
  509792 requests in 5.10s, 30.27GB read
  Socket errors: connect 0, read 0, write 0, timeout 183
Requests/sec:  99956.08
Transfer/sec:      5.94GB
[info] CPU 1653.4% | Mem 2.8GiB

=== Best: 99956 req/s (CPU: 1653.4%, Mem: 2.8GiB) ===
[info] saved results/static/6800/http-kit.json
httparena-bench-http-kit
httparena-bench-http-kit
[info] skip: http-kit does not subscribe to static-tls

==============================================
=== http-kit / async-db / 1024c (tool=gcannon) ===
==============================================
[info] waiting for server...
[info] server ready

[run 1/3]
gcannon v0.5.3
  Target:    localhost:8080/
  Threads:   64
  Conns:     1024 (16/thread)
  Pipeline:  1
  Req/conn:  25
  Templates: 5
  Expected:  200
  Duration:  10s


  Thread Stats   Avg      p50      p90      p99    p99.9
    Latency   10.20ms   7.86ms   19.40ms   47.70ms   107.70ms

  540569 requests in 10.00s, 539826 responses
  Throughput: 53.97K req/s
  Bandwidth:  206.76MB/s
  Status codes: 2xx=539826, 3xx=0, 4xx=0, 5xx=0
  Latency samples: 539826 / 539826 responses (100.0%)
  Reconnects: 21310
  Per-template: 107770,108137,108233,107974,107712
  Per-template-ok: 107770,108137,108233,107974,107712
[info] CPU 5924.6% | Mem 2.9GiB

[run 2/3]
gcannon v0.5.3
  Target:    localhost:8080/
  Threads:   64
  Conns:     1024 (16/thread)
  Pipeline:  1
  Req/conn:  25
  Templates: 5
  Expected:  200
  Duration:  10s


  Thread Stats   Avg      p50      p90      p99    p99.9
    Latency   10.39ms   8.54ms   19.00ms   33.40ms   59.60ms

  567800 requests in 10.00s, 567139 responses
  Throughput: 56.70K req/s
  Bandwidth:  217.50MB/s
  Status codes: 2xx=567139, 3xx=0, 4xx=0, 5xx=0
  Latency samples: 567138 / 567139 responses (100.0%)
  Reconnects: 22501
  Per-template: 112896,113338,113771,113840,113293
  Per-template-ok: 112896,113338,113771,113840,113293
[info] CPU 6445.6% | Mem 3.0GiB

[run 3/3]
gcannon v0.5.3
  Target:    localhost:8080/
  Threads:   64
  Conns:     1024 (16/thread)
  Pipeline:  1
  Req/conn:  25
  Templates: 5
  Expected:  200
  Duration:  10s


  Thread Stats   Avg      p50      p90      p99    p99.9
    Latency   11.94ms   9.88ms   21.50ms   38.10ms   70.20ms

  567210 requests in 10.00s, 566555 responses
  Throughput: 56.64K req/s
  Bandwidth:  217.16MB/s
  Status codes: 2xx=566555, 3xx=0, 4xx=0, 5xx=0
  Latency samples: 566555 / 566555 responses (100.0%)
  Reconnects: 22445
  Per-template: 112798,113324,113810,113591,113032
  Per-template-ok: 112798,113324,113810,113591,113032
[info] CPU 6479.3% | Mem 3.0GiB

=== Best: 56713 req/s (CPU: 6445.6%, Mem: 3.0GiB) ===
[info] input BW: 3.79MB/s (avg template: 70 bytes)
[info] saved results/async-db/1024/http-kit.json
httparena-bench-http-kit
httparena-bench-http-kit
[info] skip: http-kit does not subscribe to crud
[info] skip: http-kit does not subscribe to fortunes
[info] skip: http-kit does not subscribe to baseline-h2
[info] skip: http-kit does not subscribe to static-h2
[info] skip: http-kit does not subscribe to baseline-h2c
[info] skip: http-kit does not subscribe to json-h2c
[info] skip: http-kit does not subscribe to baseline-h3
[info] skip: http-kit does not subscribe to static-h3
[info] skip: http-kit does not subscribe to gateway-64
[info] skip: http-kit does not subscribe to gateway-h3
[info] skip: http-kit does not subscribe to production-stack
[info] skip: http-kit does not subscribe to unary-grpc
[info] skip: http-kit does not subscribe to unary-grpc-tls
[info] skip: http-kit does not subscribe to stream-grpc
[info] skip: http-kit does not subscribe to stream-grpc-tls
[info] skip: http-kit does not subscribe to echo-ws
[info] skip: http-kit does not subscribe to echo-ws-pipeline
[info] skip: http-kit does not subscribe to echo-ws-limited
[info] rebuilding site/data/*.json
[updated] /home/diogo/actions-runner/_work/HttpArena/HttpArena/site/data/frameworks.json
[updated] /home/diogo/actions-runner/_work/HttpArena/HttpArena/site/data/results/http-kit.json - 16 new, 16 total
[updated] /home/diogo/actions-runner/_work/HttpArena/HttpArena/site/data/current.json
[info] done
httparena-postgres
[info] restoring loopback MTU to 65536