Все не так страшно. Вот что народ намерил -> в самом конце страницы http://www.lpcware.com/content/forum/simple-lpc43xx-benchmark-disappointing-results Finally I received some samples of the lpc4357 with internal flash and therefore make some more benchmark tests.
If find out that as before I did not check the time optimization. Thereafter the results increases to the double.
My results now are:
225 DMIPS internal SRAM // 1.1 DMIPS / MHz
192 DMIPS internal Flash
47 DMIPS from SDRAM
18 DMIPS from SPI-Flash