It depends on your hardware specifications and internet connection speed. You can easily run 5 threads with 8 GB Of RAM and a 4th+ generation CPU. Basically, each “Free” CPU core is able to handle 5-10 threads, So If you’re using a 12-core CPU, you can use about 60-120 threads.
NOTE: If you use PPPoE/Mobile Mode, with more than one thread at a time, You won’t see any results, because your IP will be the same across all threads. If you want to use multi-threads, you should use proxies (each thread will pick a random proxy from the list of proxies).
Full guide: Threads & Capacity on docs.dalga.dev