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Go 1.27 adds a set of span‑class‑specific malloc functions for allocations ≤ 80 bytes. By generating a tiny, constant‑size allocator per span class the runtime can inline size‑dependent work (e.g. zero‑clear) and skip span‑class lookup, yielding 20‑30 % faster small allocations and ~1 % overall speed‑up for allocation‑heavy programs. The implementation is generated automatically via an AST inline…
Codename One engineers dissect why benchmark numbers can be misleading, then share concrete work on GC tuning, proper weak/soft references, and a new probing sequence for their open‑addressed HashMap that cuts miss‑probe counts from >16 k to ~1.5 per lookup.
FileInputStream and FileOutputStream implement finalize, which forces objects onto the finalizer queue and can cause long GC pauses in programs that open many files. Switching to Files.newInputStream and Files.newOutputStream (Java 7+) eliminates the finalizer overhead and improves I/O‑heavy workloads.
