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RTOS/CC2640: Ported project from BLE stack 2.1.1 to 2.2.1: out of flash space

Part Number: CC2640

Tool/software: TI-RTOS

I have an existing project on the CC2640 which uses ble stack 2.1.1 and ti-rtos 2.13. After updating my project to ble stack 2.2.1 and ti-rtos 2.20 I am unable to fit my project on the chip's 128k of flash. I've removed SNV and bond manager and even tore out a couple extras in the ti-rtos configuration. I am still ~12k bytes over the capacity of the chip.

What are my options at this point? Is there a document which states the flash size requirements of the various ble stacks and/or ti-rtos versions?