On 8/17/2016 9:16 PM, Chris Wright wrote:
So it's not surprising that the compiler doesn't handle global variables
as well as it does local ones.
Global variables are pretty much spawn of the devil. You're right that dmd does
not make a special effort optimizing them.
The way to deal with it:
1. minimize use of globals
2. if using them in a hot loop, copy a reference to the global into a local
variable, and use the local variable in the loop instead.
This also gets around the problem that thread local storage address calculation
is slow and inefficient on all platforms.
