On 10/31/14 4:50 PM, Jonathan Marler wrote:
I wrote a Windows CE app to run on our printers here at HP to test what
the Microsoft ARM compiler does with virtual function calls. I had to
do an operation with a global volatile variable to prevent the compiler
from inlining the non-virtual function call but I finally got it to work.
Calling the function 100 million times yielded the following times:
Windows Compiler on ARM (Release)
-------------------------------------------
NonVirtual: 0.537000 seconds
Virtual : 1.281000 seconds
Windows Compiler on x86 (Release)
-------------------------------------------
NonVirtual: 0.226000 seconds
Virtual : 0.226000 seconds
Windows Compiler on x86 (Debug)
-------------------------------------------
NonVirtual: 2.940000 seconds
Virtual : 3.204000 seconds
Here's the link to the code:
http://marler.info/virtualtest.c
Thanks, this is helpful.
-Steve
