Comments (5)
@aCayF Or just use the "n" variable name. Patches welcome!
from lua-resty-redis.
@aCayF Okay, it seems that the "limit" condition in the loop for i = 1, limit
is only evaluated once, according to the official Lua language manual:
http://www.lua.org/manual/5.1/manual.html#2.4.5
So the #
operator will not be re-evaluated upon every loop iteration. So we're fine here. No patch is needed.
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if i didn't misunderstand anything, i think the overhead eliminated by the #22 is re-hashing table when using table.insert and evaluating #
operator appeared in the loop block every loop iteration
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@aCayF Nah, table.insert
does not always rehash the table. Its behavior is similar to tb[i] = v
but it always invokes lj_tab_len
on the table, which is called by the #
operator too. So essentially we are saving the overhead in lj_tab_len
upon every table insertion here.
In #22, the #
operator is called by every loop iteration but in the limit
part of the loop for i = 1, limit
, it is called only once upon the loop entry.
from lua-resty-redis.
Thank you for the information :)
from lua-resty-redis.
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