On Mon, Sep 14, 2015 at 07:19:53PM +0000, Jonathan M Davis via Digitalmars-d wrote: [...]
> Isn't there some amount of configuration that can currently be done via environment variables? Or was that just something that someone had done in one of the GC-related dconf talks that never made it into druntime proper?  It definitely seemed like a good idea in any case.
[...]

If it's undocumented, it's as good as not existing as far as end users are concerned. :-) I didn't see anything mentioned in core.memory's docs, nor in dlang.org's page on the GC, nor on the wiki's GC page.


T

-- 
Programming is not just an act of telling a computer what to do: it is also an act of telling other programmers what you wished the computer to do. Both are important, and the latter deserves care. -- Andrew Morton

http://dlang.org/changelog/2.067.0.html#gc-options

On Mon, 14 Sep 2015 12:25:06 -0700
"H. S. Teoh via Digitalmars-d" <digitalmars-d@puremagic.com> wrote:

> On Mon, Sep 14, 2015 at 07:19:53PM +0000, Jonathan M Davis via Digitalmars-d wrote: [...]
> > Isn't there some amount of configuration that can currently be done via environment variables? Or was that just something that someone had done in one of the GC-related dconf talks that never made it into druntime proper?  It definitely seemed like a good idea in any case.
> [...]
> 
> If it's undocumented, it's as good as not existing as far as end users are concerned. :-) I didn't see anything mentioned in core.memory's docs, nor in dlang.org's page on the GC, nor on the wiki's GC page.
> 
> 
> T
> 

On Tue, Sep 15, 2015 at 07:08:01AM +0200, Daniel Kozák via Digitalmars-d wrote:
> 
> http://dlang.org/changelog/2.067.0.html#gc-options
[...]

Wow that is obscure.  This really needs to go into the main docs so that it can actually be found...


T

-- 
People demand freedom of speech to make up for the freedom of thought which they avoid. -- Soren Aabye Kierkegaard (1813-1855)

On Thu, Sep 17, 2015 at 11:26:17AM +0300, Dmitry Olshansky via Digitalmars-d wrote:
> On 14-Sep-2015 21:47, H. S. Teoh via Digitalmars-d wrote:
> >Over in the d.learn forum, somebody posted a question about poor
> >performance in a text-parsing program. After a bit of profiling I
> >discovered that reducing GC collection frequency (i.e., GC.disable()
> >then manually call GC.collect() at some interval) improved program
> >performance by about 20%.
> >
> 
> One thing that any remotely production-quality GC does is analyze the result of collection with respect to minimal headroom - X % (typically 30-50%). If we freed Y % of heap where Y < X, then the GC should extend the heap so that it get within X % mark of free space in the extended heap.
[...]

Excellent idea. Sounds reasonably simple to implement, though I'm not exactly familiar with the current GC so I don't know if I'll be able to implement this myself...


T

-- 
Gone Chopin. Bach in a minuet.