How much faster?
Loading your plugins with Antidote is fast! It was designed with speed in mind.
A lot of sites recommend benchmarking with this simple, but outdated, method:
for i in $(seq 10); do /usr/bin/time zsh -lic exit done
You can use that, however, zsh-bench provides a much better way to benchmark Zsh startup times. Have a look at how Antidote compares to other setups here.
The antidote developer regularly publishes zsh-bench results in his dotfiles repo.