[GCC 7.2 BUILD] Optimized TP-Link Archer C7 V2 AC1750 LEDE Firmware

Ah, ok. If it does indeed, then there is no need.
BTW, I stumbled upon OpenSSL benchmarks on OpenWrt here:

https://wiki.openwrt.org/doc/howto/benchmark.openssl

Would be quite interesting to know how much your build achieves.