Why is DNA replication faster in prokaryotes?

1- Packing- eukaryotes wrap their DNA around histone proteins to help package the DNA into smaller spaces, most prokaryotes do not have histones (with the exception of those species in the domain Archea).So going by this fact we can say as eukaryotic DNA is more densely packed it would take more time to replicate. read more

The steps for DNA replication are generally the same for all prokaryotic and eukaryotic organisms. Unwinding the DNA is accomplished by an enzyme named DNA helicase. Manufacturing new DNA strands is orchestrated by enzymes called polymerases. read more

If by faster you mean "more nucleotides replicated per minute", then the answer is eukaryotes. As Peter S. mentioned, in eukaryotes there are multiple replication forks, which means more DNA is being replicated at once; more nucleotides are being incorporated into the new strands per second. read more