Re: how io.read() will return nil ?

[KHMan <keinhong@...>]

Alexander Gladysh wrote:
> On Tue, Aug 26, 2008 at 6:17 AM, KHMan <keinhong@gmail.com> wrote:
> > Alexander Gladysh wrote:
> > > [snip]
> > > for count = 1, math.huge do
> > >   local line = io.read()
> > >   if line == "" then break end
> > >   io.write(string.format("%6d ", count), line, "\n")
> > > end
> [snip]
> You're right, I've forgot to include noop function in tests list. Here
> are the updated timings:
>
> $ time lua estrbench.lua empty_upvalue 1000000000
>       142.28 real       133.89 user         0.90 sys
> $ time lua estrbench.lua nonempty_upvalue 1000000000
>       174.01 real       163.54 user         1.18 sys

These should be similar, since both involve an upvalue load and a 
compare of the same type of object.

> local nonempty_upvalue = function()
>   local a = "nonempty"
>   return a == nonempty_string
> end

Was the script doing a table lookup for "nonempty_string"?

--
Cheers,
Kein-Hong Man (esq.)
Kuala Lumpur, Malaysia