According to OnePlus' testing, the OnePlus 3's Dash Charging technology is much faster compared to the Galaxy S7's Adaptive Fast Charging technology, as the OnePlus 3 managed to beat the Galaxy S7 by 14% when the screen was off, while the flagship killer destroyed the S7 with 44% faster charging speed when the screen was turned on.
Check out OnePlus 3 VS Samsung Galaxy S7 Charging Speed Test.