dont merge - this is a reminder to please make a menu for optimzation selection - with the massive flash on the nrf52840 we dont need to conserve size and its 2+ times faster with -fast

Author: Ladyada

platform.txt

@@ -32,7 +32,7 @@ compiler.path={runtime.tools.arm-none-eabi-gcc.path}/bin/
 compiler.c.cmd=arm-none-eabi-gcc
 compiler.c.flags=-mcpu={build.mcu} -mthumb -c -g {compiler.warning_flags} {build.float_flags} -std=gnu11 -ffunction-sections -fdata-sections -nostdlib --param max-inline-insns-single=500 -MMD
 compiler.c.elf.cmd=arm-none-eabi-gcc
-compiler.c.elf.flags=-Os -Wl,--gc-sections -save-temps
+compiler.c.elf.flags=-Ofast -Wl,--gc-sections -save-temps
 compiler.S.cmd=arm-none-eabi-gcc
 compiler.S.flags=-c -g -x assembler-with-cpp
 compiler.cpp.cmd=arm-none-eabi-g++
@@ -59,7 +59,7 @@ nordic.path={build.core.path}/nordic
 # ARDUINO_FEATHER52 is defined for backward compatiable with other lib only
 # should be replaced by ARDUINO_NRF52_ADAFRUIT in the future
 
-build.flags.nrf= -DSOFTDEVICE_PRESENT -DARDUINO_FEATHER52 -DARDUINO_NRF52_ADAFRUIT -DNRF52_SERIES -DLFS_NAME_MAX=64 -Os {build.debug_flags} "-I{build.core.path}/cmsis/include" "-I{nordic.path}" "-I{nordic.path}/nrfx" "-I{nordic.path}/nrfx/hal" "-I{nordic.path}/nrfx/mdk" "-I{nordic.path}/nrfx/soc" "-I{nordic.path}/nrfx/drivers/include" "-I{nordic.path}/nrfx/drivers/src" "-I{nordic.path}/softdevice/{build.sd_name}_nrf52_{build.sd_version}_API/include" "-I{rtos.path}/Source/include" "-I{rtos.path}/config" "-I{rtos.path}/portable/GCC/nrf52" "-I{rtos.path}/portable/CMSIS/nrf52" "-I{build.core.path}/sysview/SEGGER" "-I{build.core.path}/sysview/Config" "-I{build.core.path}/Adafruit_TinyUSB_Core" "-I{build.core.path}/Adafruit_TinyUSB_Core/tinyusb/src"
+build.flags.nrf= -DSOFTDEVICE_PRESENT -DARDUINO_FEATHER52 -DARDUINO_NRF52_ADAFRUIT -DNRF52_SERIES -DLFS_NAME_MAX=64 -Ofast {build.debug_flags} "-I{build.core.path}/cmsis/include" "-I{nordic.path}" "-I{nordic.path}/nrfx" "-I{nordic.path}/nrfx/hal" "-I{nordic.path}/nrfx/mdk" "-I{nordic.path}/nrfx/soc" "-I{nordic.path}/nrfx/drivers/include" "-I{nordic.path}/nrfx/drivers/src" "-I{nordic.path}/softdevice/{build.sd_name}_nrf52_{build.sd_version}_API/include" "-I{rtos.path}/Source/include" "-I{rtos.path}/config" "-I{rtos.path}/portable/GCC/nrf52" "-I{rtos.path}/portable/CMSIS/nrf52" "-I{build.core.path}/sysview/SEGGER" "-I{build.core.path}/sysview/Config" "-I{build.core.path}/Adafruit_TinyUSB_Core" "-I{build.core.path}/Adafruit_TinyUSB_Core/tinyusb/src"
 
 # usb flags
 build.flags.usb= -DUSBCON -DUSE_TINYUSB -DUSB_VID={build.vid} -DUSB_PID={build.pid} '-DUSB_MANUFACTURER={build.usb_manufacturer}' '-DUSB_PRODUCT={build.usb_product}'