range() is not the best way to check range?

[Summercoolness at gmail.com]

Summercoolness at gmail.com wrote:
> it seems that range() can be really slow:
>
>     if i in range (0, 10000):


My original use was like this:

    if i in range (iStart, iEnd):
        listData.append(a)

in which iStart is 1000 and iEnd is 1008

so in that case, the program ran fine...
but later on, i wanted to include all data, so I relaxed the range by
setting iStart to 0 and iEnd to 9999 and later on i found that the
program was slow due to this.

So looks like the usage of

   if sDay in ("Tue", "Wed", "Thu"):

is more like good use of "in a list"  but in range(0,10000) will be a
big search in a list.