1~10 us 1~10 us Metadata Size ~ 2kb 200~300 byte Memory ܻ ೡػ Stack ࢎਊ (1MB) ਃ द Heap ࢎਊ (~1,400 bytes) ਃ द Heap ࢎਊ (~300 bytes) Context switching cost 1 ~ 10 us (ழօ) ~ 2 us ~ 1 us Numbers < 5,000 Millions Millions Best cases CPU Bounded Per Request Legacy Code High-concurrent code Event based Systems Structured concurrency and cancellation