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Chris Tate
050bbd852c
The frontend's syntax trees and program state refer to each other, so reference counting frees almost none of them when a build disposes the frontend. Whether a cycle pass reclaimed them before the build ended depended on where the collector's schedule happened to be. Passes during the frontend found its data live and widened the growth fractions, so the next pass waited until the heap had grown well past its size at disposal, and the dead frontend and the emitter's garbage stayed until the build ended. The native compiler now runs scr_collect_cycles_phase right after it disposes the frontend, through a host function. The runtime entry point sweeps, then restarts the growth fractions and the death rule's backoff from the heap the sweep leaves, as after a productive pass. Under Node the hook is unset.