On Wed, 13 Apr 2011, Chris Ball wrote:
> Converts from:
> struct mmc_command cmd;
> memset(&cmd, 0, sizeof(struct mmc_command));
>
> to:
> struct mmc_command cmd = {0};
>
> because it's shorter, as performant, and easier to work out whether
> initialization has happened.
Did you disassemble the resulting binary to make sure this is actually
as performant?
I'm asking because gcc used to do a horrible dumb job with such patterns
where it would allocate two instances of the structure on the stack i.e.
one for the named variable and one for the initializer, then fill the
later with zeroes, and then call memcpy() to copy the initializer over
to the named instance.
Nicolas
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