The showcase page is slow to load. It would be good to use lower-resolution images (e.g. 600px, e.g. 72dpi) for screenshot images so that the page would load faster. Currently we have:
$ file base/static/img/screenshots/*
base/static/img/screenshots/auth.png: PNG image data, 3650 x 3023, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/caltech.png: PNG image data, 3054 x 2118, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/cds.png: PNG image data, 1430 x 1200, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/cod.png: PNG image data, 1430 x 1200, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/desy.png: PNG image data, 2061 x 1467, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/epfl.png: PNG image data, 2019 x 1671, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/gsi.png: PNG image data, 2286 x 2118, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/hepdata.png: PNG image data, 3642 x 2832, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/hesso.png: PNG image data, 3642 x 2954, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/icimod.png: PNG image data, 3642 x 2134, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/inspire.png: PNG image data, 1318 x 1200, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/itu.png: PNG image data, 2632 x 2118, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/julich.png: PNG image data, 2472 x 2118, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/mlz.png: PNG image data, 2472 x 2101, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/mpe.png: PNG image data, 3642 x 2695, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/ntnu.png: PNG image data, 3642 x 2118, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/ohchr.png: PNG image data, 2632 x 2118, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/olin.png: PNG image data, 2632 x 2118, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/rero.png: PNG image data, 2472 x 2118, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/uab.png: PNG image data, 3642 x 2552, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/unizar.png: PNG image data, 3642 x 3240, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/unov.png: PNG image data, 2632 x 2118, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/wfp.png: PNG image data, 2632 x 2118, 8-bit/color RGBA, non-interlaced
base/static/img/screenshots/zenodo.png: PNG image data, 1430 x 1200, 8-bit/color RGBA, non-interlaced