This book constitutes the thoroughly refereed post-conferenceproceedings of the 22nd International Symposium on Implementation andApplications of Functional Languages, IFL 2010, held in Alphen aan denRijn, The Netherlands, in September 2010.The 13 revised full papers presented were carefully reviewed and wereselected from 31 submissions. The IFL symposia bring togetherresearchers and practitioners that are actively engaged in theimplementation and the use of functional and function based programminglanguages. Every year IFL provides a venue for the presentation anddiscussion of new ideas and concepts, of work in progress, and ofpublication-ripe results.