QUESTION: obstack, size of new chunk?

[Sean Nakasone]

Hi, lib/obstack.c has a function, _obstack_newchunk(). 

there's a formula used to calculate a variable new_size

new_size = (obj_size + length) + (obj_size >> 3) + h->alignment_mask + 100;

i understand obj_size + length, but what's the other stuff for?

thanks,
Sean

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