[true-async] + drop H3 listener

[EdmondDantes]

Supersedes #742 — same v0.6.3 / 0.7.0-beta.4 bump plus the fix for the missing short-lived result.

The short-lived gap

The v0.6.3 benchmark run skipped limited-conn for both 512c and 4096c:

=== true-async-server / limited-conn / 512c (tool=gcannon) ===
[info] waiting for server...
[warn] true-async-server did not come up for limited-conn; skipping

The server container never passed the health probe, so no result was recorded and the leaderboard shows short-lived as not participating.

Cause: entry.php registered an HTTP/3 QUIC listener on UDP 8443. meta.json subscribes to no h3 profile, so that listener serves nothing — but its UDP bind is an extra startup step that races with the previous container's teardown on back-to-back profile runs, intermittently making HttpServer::start() fail before the probe succeeds. baseline and pipelined (earlier in the run) came up; limited-conn (3rd) lost the race twice.

Fix: drop the H3 listener and the dead H3_PORT / H3_DISABLE env plumbing. The arena image never benchmarks HTTP/3.

[EdmondDantes]

/benchmark -f true-async-server --save

[github-actions]

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

[github-actions]

⚠️ /benchmark --save cannot start: main has diverged and cannot be auto-merged into this branch. Please merge or rebase main manually, push, and re-run /benchmark --save.

[EdmondDantes]

Replaced by a branch based on current main (the previous branch had unrelated history after #742 merged — the /benchmark merge-check failed).

[github-actions]

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

[github-actions]

Benchmark Results

Framework: true-async-server | Test: merge-check

Test	Conn	RPS	CPU	Mem	Δ RPS	Δ Mem

Full log

[info] available CPUs: 128
[info] framework: true-async-server (true-async-server, PHP)
[info] subscribed tests: baseline,pipelined,limited-conn,json,json-comp,json-tls,upload,api-4,api-16,static,static-h2,baseline-h2,baseline-h2c,json-h2c,async-db,fortunes
[info] building image: httparena-true-async-server
#0 building with "default" instance using docker driver

#1 [internal] load build definition from Dockerfile
#1 transferring dockerfile: 506B done
#1 DONE 0.0s

#2 [internal] load metadata for docker.io/trueasync/php-true-async:0.7.0-beta.4-php8.6
#2 DONE 0.9s

#3 [internal] load .dockerignore
#3 transferring context: 2B done
#3 DONE 0.0s

#4 [internal] load build context
#4 transferring context: 95B done
#4 DONE 0.0s

#5 [1/4] FROM docker.io/trueasync/php-true-async:0.7.0-beta.4-php8.6@sha256:3f1c4bafa622b12288edb5bfab2fd0085053a87d66adc87fdf05dbc8c04a86d6
#5 resolve docker.io/trueasync/php-true-async:0.7.0-beta.4-php8.6@sha256:3f1c4bafa622b12288edb5bfab2fd0085053a87d66adc87fdf05dbc8c04a86d6 0.0s done
#5 DONE 0.0s

#6 [2/4] RUN printf '%s\n'       'opcache.jit=1255'       'opcache.jit_buffer_size=128M'       'opcache.memory_consumption=256'       'opcache.max_accelerated_files=10000'       'opcache.validate_timestamps=0'       'memory_limit=1024M'     > /etc/php.d/99-arena.ini  && rm -f /etc/php.d/xdebug.ini
#6 CACHED

#7 [3/4] WORKDIR /app
#7 CACHED

#8 [4/4] COPY entry.php PostgreSQL.php SQLite.php /app/
#8 CACHED

#9 exporting to image
#9 exporting layers done
#9 exporting manifest sha256:82b3198860de64d27123d8021b1dd50542f431d6f95796b41e92b42e6e259241 done
#9 exporting config sha256:fbed891bc2cc635b4fb34f546f9f4ceca7d6e0dd687b7ddafa2f7ff858a79e56 done
#9 exporting attestation manifest sha256:aeb1866003ade91f8df975ab4abba17bd78e467501f5f5f2782ca1767c8f7d77
#9 exporting attestation manifest sha256:aeb1866003ade91f8df975ab4abba17bd78e467501f5f5f2782ca1767c8f7d77 0.0s done
#9 exporting manifest list sha256:a487b7a5a6f1924000b43bdd7bea811d5cc69cb9e958ab73cfb8245c0b634f7d 0.0s done
#9 naming to docker.io/library/httparena-true-async-server:latest done
#9 unpacking to docker.io/library/httparena-true-async-server:latest done
#9 DONE 0.1s
[info] tuning host for benchmark runs
[info] CPU governor → performance
[info] setting kernel socket limits
[info] setting UDP buffer sizes for QUIC
[info] setting loopback MTU to 1500 (realistic Ethernet)
[info] restarting docker daemon
[info] dropping kernel caches
[info] starting postgres sidecar
[info] postgres ready (seeded)
[warn] unknown profile: merge-check
[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/current.json
[info] done
httparena-postgres
[info] restoring loopback MTU to 65536
[info] restoring CPU governor → powersave