LibreOffice Portable - slow startup compared to regular LO
Title pretty much says it all.
The installed LO takes about 1-2 seconds to start up, while LO Portable takes about 8 seconds (warm start) and 13 seconds (cold start). Of course, from the same drive.
Now, I did not install the regular LO with everything, so maybe it's not a fair comparison. But still, it seems like too big of a difference.