Scientific Linux 6.9 vs. 6.10 vs. 7.5 Benchmarks
CompileBench is one of the I/O workloads measurably impacted by Spectre/Meltdown mitigation, as can be seen from the SL6.9 to SL6.10 performance, if you hadn't already upgraded your kernel on 6.9. With the more I/O heavy initial creation sub-test, Scientific Linux 7.5 comes in as even slower, either due to the further mitigation work found in the EL7/SL7 kernel or possibly due to the transition from EXT4 to XFS as the default file-system.
In the case of the CPU-focused Dolfyn fluid dynamics benchmark, Scientific Linux 7.5 comes out as slightly faster over version 6. This may be due to the kernel upgrades or also the change in the default compiler from GCC 4.4 to GCC 4.8.
In most workloads on this Xeon Scalable Gold server, Scientific Linux 7.5 is at least slightly faster than Scientific Linux 6.10.