This is SO useful!

AutoreleasePoolSample.m

// https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/MemoryMgmt/Articles/mmAutoreleasePools.html

– (id)findMatchingObject:(id)anObject {
 
    id match;
    while (match == nil) {
        @autoreleasepool {
 
            /* Do a search that creates a lot of temporary objects. */
            match = [self expensiveSearchForObject:anObject];
 
            if (match != nil) {
                [match retain]; /* Keep match around. */
            }
        }
    }
 
    return [match autorelease];   /* Let match go and return it. */
}