class Util

ARCH_BITS = ENV.fetch("RQRCODE_CORE_ARCH_BITS", nil)&.to_i || 1.size * 8

This value is used during the right shift zero fill step. It is auto set to 32 or 64 depending on the arch of your system running. 64 consumes a LOT more memory. In tests it's shown changing it to 32 on 64 bit systems greatly reduces the memory footprint. You can use RQRCODE_CORE_ARCH_BITS to make this change but beware it may also have unintended consequences so use at your own risk.