STM32

MCU	Flash Size [kB]	Interface	Autoprogram [s]	Write[s]	Read [s]	Programming speed [kB/s]	Read speed [kB/s]

MCU	Flash Size [kB]	Interface	Autoprogram [s]	Write[s]	Read [s]	Programming speed [kB/s]	Read speed [kB/s]
STM32H7A3G	1024	USB DFU	9.7	5.8	3.1	175	325
STM32L462CE	512	USB DFU	8.4	6.9	0.8	73	667
STM32U585ZI	2048	USB DFU	27.8	20.4	6.3	100	322
STM32L552ZE	512	USB DFU	8.8	6,8	1.2	75	418
STM32H733ZG	1024	USB DFU	14.1	6.1	3.4	169	371

Note:

Autoprogram time –> Interface initialization, Erase, Program and Verify (Flash only)
Write time –> Interface initialization, Program (Flash only)
Read time –> Interface initialization, Read (Flash only)
Programming speed – Whole flash programming speed without interface initialization
Read speed – Flash reading speed without interface initialization

GangFlasher-ST Wiki