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Global variables are slower?
- To: "'gcc at gcc dot gnu dot org'" <gcc at gcc dot gnu dot org>
- Subject: Global variables are slower?
- From: Anjul Srivastava <anjul dot srivastava at sanchez dot com>
- Date: Fri, 11 Feb 2000 17:15:46 -0500
Hello
folks,
Somebody told me
that accessing a global variable requires an extra instruction, and thus, global
variables are slower than local variables.
Is this true for gcc
generated code? I'm surprised if it is because I understood from my knowledge of
C that there was no performance difference between local and global
variables.
Can it be optimized
out, at least for repeated accesses, if it is true?
Thanks a
lot,
Anjul.