If two objects are identical (actually point to the same slot in memory),
they can immediately be determined to be equal.
There are also some ways to quickly determine that things are definitely
not equal. For example, two vectors with different sizes are not equal.
As you've pointed out, if the
Presumably it then compares the objects element by element. If the common
case is for the arguments to (= x y) to be unequal with unequal hashes,
though, this is still considerably faster.
On Thu, Nov 28, 2013 at 5:03 PM, Andy Smith wrote:
> Hi,
>
> I heard Rich Hickey talking about how identity
Hi,
I heard Rich Hickey talking about how identity in clojure is synonymous
with value-based tests of equality. To make this efficient he describes
that objects store cached hashes that are used to speed up these tests of
equality, so clojure isnt comparing every data member of a complex data
