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Malte UblandClaude Opus 5.5
989d0d6bc2
Every release that left a headered object alive and unbuffered called scr_cyc_on_release, which looked up the type's bypass statistics, pushed the object, kept a running total and compared it with two triggers. The nursery case now has a fast path that appends the object to the nursery buffer itself, while the runtime-maintained window says the append can neither make a collection due nor grow the buffer, and the live count is below the allocation trigger: - scr_rc.h exports the candidate buffers (scr_cyc_buffers: the three buffers, the window and the allocation trigger) where the collector state is ordinary globals, and scr_cyc_append. The runtime's own release paths (scr_cyc_released) append inline, and scr_cyc_on_release tries the append first. - Optimized emitted code buffers through one sc_cyc_append helper per module, called with preserve_mostcc, so release fast paths keep the size of the plain call they had (inlining the append into every release fast path grew the self-hosted compiler's text by 4.6%) and their callers keep their registers. Its runtime call goes through a second preserve_mostcc function, which keeps the register saves off the append path. - scr_cycle.c keeps the window: recomputed where buffers, capacity or the trigger change in bulk, lowered by one on older buffering and nursery deaths, 0 during passes. The running total is gone; the slow path sums the buffers. - An appended candidate whose type bypasses the nursery would have been buffered past it. scr_cyc_route_bypassed moves such candidates before any scheduling decision or pass reads the buffers, consuming the bypass counts as scr_cyc_on_release does (skipped while no type bypasses). test_cycle checks the window (the release that reaches the trigger still collects) and the routing of inline-buffered candidates of a bypassed type; its mature-bypass probe routes before reading generations. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>