Hi, I have a question about map-loading performance in ChimeraX. We use Chimera for the visualization of EM maps, and have recently loaded ChimeraX 1.3 on our Centos 7 workstations. We frequently run a script that opens Chimera (or ChimeraX) and loads one or more maps. Running the script for the same 2 Gb CCP4-format map in three different programs, I get the following times for program startup + map loading, i.e., the time from when I run the script at the command line to when the map appears onscreen: Chimera 1.12 13 seconds ChimeraX 0.1 25 seconds ChimeraX 1.3 66 seconds This isn't exactly the direction I had hoped performance would trend, and was wondering if there was anything that could be done within ChimeraX 1.3 to speed the process along a little. Thanks, Brian -- BRIAN HUDSON, Ph.D. Biocurator, RCSB Protein Data Bank Assistant Research Professor, Institute for Quantitative Biomedicine Rutgers, The State University of New Jersey 174 Frelinghuysen Road, Piscataway NJ 08854 P: 848.445.4941 | E: brian.hudson@rcsb.org