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merge_config.sh shell/sed/grep loop scales poorly and is slow. With Yocto genericarm64 kernel and around 190 config fragments the script takes more than 20 minutes to run on a fast build machine. Re-implementation with awk does the same job in 10 seconds. Using awk since it is likely available in the build environments and using perl, python etc would introduce more complex runtime dependencies. awk is good enough and lot better than shell/sed/grep. Output stays the same but changed execution time means that parallel job output may be ordered differently. Signed-off-by: Anders Roxell <anders.roxell@linaro.org> Signed-off-by: Mikko Rapeli <mikko.rapeli@linaro.org> Link: https://patch.msgid.link/20260122105751.2186609-1-mikko.rapeli@linaro.org Signed-off-by: Nathan Chancellor <nathan@kernel.org>