Adding of O3 on linking stage for OPTIMIZATION=-O3 cases (#12339)
Added missing O3 flag to linking stage in default option "-O3 -flto". Flags doesn't lead to significant changes in performance: - +0.21% in geomean for all benchmarks on ICX bare-metal (256 cpus) - +0.33% in geomean for all benchmarks on m6i.2xlarge (16 cpus) Checked on redis from Mar'30 (commit 1f76bb17 ). Comparison file is attached.
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