Re: Function to force table to shrink?

> I was under the impression that PUC Lua does actually shrink tables
> sometimes, at least the hash part, but I will check the sources and test
> again (unless the authors would like to answer off the top of their heads
> ;)) so I can make some reasonable statements about what is likely to happen
> and when.

A table will shrink if you keep adding keys to it. Adding keys will
eventually force a rehash; if, at that point, the table needs less space
than it was using, it shrinks.

------------------------------------------------
local a = {}

for i = 1, 1e5 do a[i] = true end
print(collectgarbage"count" * 1024)

for i = 1, 1e5 do a[i] = nil end
print(collectgarbage"count" * 1024)

a.x = true
print(collectgarbage"count" * 1024)
------------------------------------------------

-- Roberto

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