For example, if a Ledger file contains transactions with the use of both
EUR and EUR {=PRICE}, then regular reports will always show the
{=PRICE}, disabling the by-name commodity merging that takes place. In
brief, fixated and non-fixated commodities are now non-mergable.
If a file contains all of one, or all of the other, they will still be
merged, since these separate usages do not conflict the way that fixated
and non-fixated together do.
Every annotated commodity is based on a "referent", or the unannotated
version of that commodity. When stripping all annotations away,
however, rather than simply returning the referent we were actually
searching for it by name. There was no reason to do this, not to
mention it was taking up to 7% of the total runtime of some reports.
