  We present PDFFlow, a new software for fast evaluation of parton distribution
functions (PDFs) designed for platforms with hardware accelerators. PDFs are
essential for the calculation of particle physics observables through Monte
Carlo simulation techniques. The evaluation of a generic set of PDFs for quarks
and gluons at a given momentum fraction and energy scale requires the
implementation of interpolation algorithms as introduced for the first time by
the LHAPDF project. PDFFlow extends and implements these interpolation
algorithms using Google's TensorFlow library providing the possibility to
perform PDF evaluations taking fully advantage of multi-threading CPU and GPU
setups. We benchmark the performance of this library on multiple scenarios
relevant for the particle physics community.
