Primrose Lake, also known as version 1.7.12 will be the last version of version 1.7 to be released. Despite this, it's a huge update.
1.7.12 not only brings single line if statements using the if...then statements but it also brings performance improvements in two areas.
The first area for a performance improvement is the When-Is statement (aka the case statement). The improvement in performance comes from statements that are long in size but unfortunately smaller statements get a performance penalty. For performance gains statements need to be around about 6 or more options.
There have been a few parser improvements too.
But the most significant change is the way in which libraries are now imported. Any ZPE compiled library is no longer imported at startup and is now deferred. They are now imported only through the import command.
ZPE 1.7.12 is now available from my Download Center.