[erlang-questions] Best Practice in Map keys: Atoms or Binaries (or Strings)?
Björn-Egil Dahlberg XB
Mon Oct 3 11:19:55 CEST 2016
On 10/03/2016 11:12 AM, Björn-Egil Dahlberg XB wrote:
> On 10/03/2016 11:06 AM, José Valim wrote:
>> Also, for literal keys the hashing is done at *load time* so it
>> will only hash again when it that hash exhausted, typically this
>> will happen if Maps are larger then 50000 pairs.
>> Neat. Does this happen only on maps creation or also when updating
>> maps with := or =>? What about matching on maps?
> Any get_map_element(s) so matching and lookups with literals for sure.
> We haven't done it for updating or creation but lookups are far more
> common. Also, not for BIFs.
And ofc, if everything are literals at compile time the map is
constructed at compile time, not load time or run time.
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