Performance optimizations #1346

Job	Run time
Compile the UX-less version of the app on Nano S+ for performance tests	1m 19s
Compilation for X, S+, Stax and Flex (nanox, $NANOX_SDK)	1m 44s
Compilation for X, S+, Stax and Flex (nanosp, $NANOSP_SDK)	1m 42s
Compilation for X, S+, Stax and Flex (stax, $STAX_SDK)	1m 54s
Compilation for X, S+, Stax and Flex (flex, $FLEX_SDK)	1m 55s
Performance report	3m 55s
Tests with the Python library and legacy Bitcoin app	41s
Unit test	1m 43s
Tests with the JS library	1m 14s
Tests on mainnet (nanox)	30s
Tests for rust client library	1m 36s
Tests on mainnet (nanosp)	26s
Tests on mainnet (stax)	26s
Tests on mainnet (flex)	26s
	19m 31s

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