From: "funny_falcon (Yura Sokolov)" Date: 2013-10-04T20:38:08+09:00 Subject: [ruby-core:57667] [ruby-trunk - Feature #8985][Open] xwillfree - promise to free memory Issue #8985 has been reported by funny_falcon (Yura Sokolov). ---------------------------------------- Feature #8985: xwillfree - promise to free memory https://bugs.ruby-lang.org/issues/8985 Author: funny_falcon (Yura Sokolov) Status: Open Priority: Normal Assignee: Category: core Target version: current: 2.1.0 This patch changes semantic of RUBY_GC_MALLOC_LIMIT. Instead of being "periodical trigger" it becomes more like "safety trigger" which fires in allocation increase (instead of allocation amount). So that there is less need to tune RUBY_GC_MALLOC_LIMIT at all, and default 8Mb becomes meaningful. Before GC relaxation in commit 8c0033a make check ran 13% faster (292s instead of 338s) and doesn't seems to use more memory. It is now runs at the same speed, but I propose to revert some part of GC relaxation. Tradeoffs for patch simplicity: - it is not exact: only String, Array, Object, Struct, Bignum and Time are handled - only one function (xwillfree) introduced. Perhaps, more readable api could be useful. - xwillfree exposed to the public (ruby.h). Perhaps, it should be in an internal.h, but st.c doesn't include internal.h. And may be it could be useful for extensions. https://github.com/ruby/ruby/pull/414 https://github.com/ruby/ruby/pull/414.patch https://github.com/ruby/ruby/pull/414.diff -- http://bugs.ruby-lang.org/