Eelco Dolstra 0629601da1 Move EvalState from the stack to the heap ... EvalState contains a few counters (e.g. nrValues) that increase quickly enough that they end up being interpreted as pointers by the garbage collector. Moving it to the heap makes them invisible to the garbage collector. This reduces the max RSS doing 100 evaluations of nixos.tests.firefox.x86_64-linux.drvPath from 455 MiB to 292 MiB. Note: ideally, allocations would be much further up in the 64-bit address space to reduce the odds of an integer being misinterpreted as a pointer. Maybe we can use some linker magic to move the .bss segment to a higher address.		2018-06-12 17:49:55 +02:00
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local.mk	nix-prefetch-url: Rewrite in C++	2015-10-01 16:47:43 +02:00
nix-prefetch-url.cc	Move EvalState from the stack to the heap	2018-06-12 17:49:55 +02:00