Currently, to get the first release date of a single recording, one has to search for its release group and parse the tag <first-release-date />. This causes a terrible slowdown when searching for multiple tracks (considering the limit of one lookup per second): for example, with a list of 10 tracks, instead of taking 10 seconds (1 per track), it takes 10 + N (where N is the number of release groups associated to all the tracks). N is usually a high number.

I'm asking if <first-release-date /> can be added to the <release-group /> tag in recording search. It would speed up a lot the new Amarok tagger I'm working on.

For example:

• Lookup (JSON / XML) with added date since MBS-1424;
• Search (JSON / XML) which relates to this ticket.

Additionally, advanced indexed search for recordings can be made using the firstreleasedate field. For example, recordings that have first been released in 1930 from the website or from the API (in JSON and in XML).