When I need to pad my savings I cut some costs but mostly I just work extra hours in side gigs. I couldnt imagine its worth going to multiple grocery stores to compare prices. Shop at 1 store, pay more for some items, work an extra hour to make up for it. I'm building my career and getting paid instead of experiencing traffic, grocery stores at peak hours, check out lines, and loading/unloading food to and from the car/house for a second time.
Does it really make sense for you financially to do that?