If you want to delete the browser cache in Safari, you can do that quickly with a keyboard shortcut or through the developer menu.
Apple makes it easy: Deleting Safari's Browser cache through a keyboard shortcut
The fastest way to clear your cache is to use following shortcut: [CMD] + [ALT] + [E].
Clearing the cache through the developer menu
You can also enable a developer menu in Safari to enable several professional options. To display the developer menu:
Use CleanMyMac X instead of doing the dull routine over and over again. It will notify you when it’s time to clean. All you need to do is click a single button.