On Friday, 13 February 2015 at 08:21:53 UTC, Per Nordlöw wrote:
When reading/parsing data from disk often try to write code
such as
foreach (const line; File(filePath).byLine)
{
auto s = line.splitter(" ")
const x = s.front.to!uint; s.popFront;
const y = s.front.to!double; s.popFront;
...
}
In response to all the discussions regarding performance
problems related to the GC I wonder if there are plans to
implement data-flow analysis in DMD that can detect that the
calls to s.front in the example above doesn't need to use the
GC. This because their references aren't used outside of the
foreach scope (Escape Analysis).
I haven't looked into the source, but the only point where this
snippet should allocate is at byLine.
