I didn't realize it but a bit of checking tells me that both Adblock and Adblock Plus slow down the effective and actual speed of refresh of web pages.
Is there a configuration or other setting that I am missing or is this the case with all Adblockers?
Best Answer
I use and suggest uBlock for Safari.
UPDATE 2: Even better perhaps is a Safari port, by el1t, of uBlock Origin. It is based on the latest version and @Scott says it works well. Available for download here on github.
(I wondered why https://safari-extensions.apple.com/?q=ublock turns up 0 results. Still does, oddly. https://github.com/gorhill/uBlock/issues/1596 explains why for a while there was no uBlock Origin for Safari.)
UPDATE: Another option is to try Opera. It now comes with a built-in ad-blocker which, it's said, allows it to work much faster. Safari has also received some enhancements that allow it to do a limited amount of ad-blocking very quickly.
Evidence the uBlock extensions speed things up