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Add jdk27-perf: the same Spring Boot service measured on JDK 25 and JDK 27

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Live heap, throughput, p99 and startup across four configurations, including opt-in and opt-out of
compact object headers.

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01WzVQ6zFh9cuLPj9RSbRH8U
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asmhatre
2026-10-12 17:30:55 +00:00
co-authored by Claude Sonnet 5.5
parent fc05eed4b5
commit d565be93c6
13 changed files with 388 additions and 1 deletions
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jdk27-perf/output/01-defaults.txt
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== JDK 25
openjdk version "25.0.4.1" 2026-08-18 LTS
size_t MaxHeapSize = 1568669696 {product} {ergonomic}
bool UseCompactObjectHeaders = false {product lp64_product} {default}
bool UseG1GC = true {product} {ergonomic}
bool UseSerialGC = false {product} {default}
bool UseZGC = false {product} {default}
== JDK 27
openjdk version "27" 2026-09-15
size_t MaxHeapSize = 1568669696 {product} {ergonomic}
bool UseCompactObjectHeaders = true {product lp64_product} {default}
bool UseG1GC = true {product} {ergonomic}
bool UseSerialGC = false {product} {default}
bool UseZGC = false {product} {default}