This record has been achieved on an STM32F4 device, where J-Link programs 278 Kbytes/s, making it possible to program a 1MB device in less than 4 Seconds.
No other debug probe comes close to the performance of the J-Link. In a comparison test; the closest competitor took 4 times as long to program the same device.
The same technology works for all supported Cortex M microcontrollers, for internal and external flash. The exact speed achieved depends on the device.
It is very easy to take advantage of this great increase in speed when working with any of the supported IDEs. Simply using the latest SEGGER J Link software will supercharge the IDE. The software is available free of charge for existing J-Link users. On some IDEs it is necessary to upgrade to the fast SEGGER J Link flash loader rather than using the basic flash loader provided by the IDE vendor.
While debugging in flash memory of target hardware, the key variable in debugging speed is not the IDE but rather, the performance of the flash loaders and debug probe.
“A high flash download speed is very important both in production and during development. It demonstrates once again the leading position SEGGER has in this field. SEGGER’s flash programming algorithm outperforms the competition by far, including much more expensive probes”, says Alexander Gruener, Product Manager for J-Link.