AprismJDK v26.5 - Runtime Performance

AprismJDK v26.5

Fourth stable release focused on runtime performance.

Deliverables

Area	What shipped
CDS tooling	CdsArchive API + create-cds-archive.ps1 / run-with-cds.ps1
Startup benchmark	StartupBenchmark + CI-runnable startup-benchmark.ps1
Container	Multi-stage Dockerfile (fork build + minimal runtime)
Linux distro	release.yml with SBOM generation
Memory analysis	Heap footprint + jlink compact runtime measurements
Performance report	docs/15-performance-report.md (EN + ZH)

Key measurements

Metric	Stock Temurin 25	AprismJDK	Verdict
Startup (source-launcher)	1718 ms	1712 ms	equivalent
Throughput: string concat	5.02 ms	3.22 ms	36% faster
Throughput: math loop	5.32 ms	3.88 ms	27% faster
Heap footprint (idle)	2.1 MB	2.2 MB	+0.1 MB
Agent overhead	n/a	~50-65 ms	within budget
Compact runtime	~550 MB	35.2 MB (jlink)	brand preserved

Investigation results

• CRaC: not in OpenJDK mainline; requires Azul CRaC fork. Deferred.
• AOT cache (JEP 483): flags present but create phase fails on Windows. Deferred.
• CDS: default archive works well; offsets the 21-module cost.
• jlink compact: 35.2 MB (6% of full) with aprismjdk branding intact.

Artifacts

File	For
AprismJDK-26.5-windows-x64-jdk.zip/.tar.gz	Full fork image (Windows x64)
aprismate-26.5.jar	Self-contained agent for stock JDK 21+
SHA256SUMS.txt	Verify before use

764 tests, 0 failures. 5-patch reproducible series. GPL-2.0 + Classpath Exception.