Clojure, Java 9, and You
summary
Java 9 changes that actually matter: compact strings halves memory for UTF-8 text at no code change; jaotc AOT compiles java.base (≈460s) and an Uberjar (≈360s) but shows no wall‑time startup win (baseline 1.24s) while reducing CPU time — runtime profiling and fiddly flags limit shipping precompiled code; G1 default GC does region compaction and string deduplication; the module system breaks boot‑classpath tricks, causes IllegalAccessExceptions for reflective access (workarounds: --add-exports/--add-opens or temporary --permit-illegal-access), and offers deterministic class loading but no versioning.
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chapters (4)
- 0:00Start
- 7:48G1 Garbage Collector Advantages
- 23:50Modules: Collateral Damage - Refection on private protected fields/ methods
- 31:03Summary
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