~/results.bench KVM testing on Arch Linux via the Phoronix Test Suite. Regular CPU setup I always do.: Processor: Intel Core (4 Cores / 8 Threads), Motherboard: QEMU Standard PC (Q35 + ICH9 2009) (0.0.0 BIOS), Chipset: Intel 82G33/G31/P35/P31 + ICH9, Memory: 8GB, Disk: 20GB, Graphics: Red Hat QXL paravirtual graphic card, Audio: QEMU Generic, Network: Red Hat Virtio device OS: Arch Linux, Kernel: 5.13.10-arch1-1 (x86_64), Compiler: GCC 11.1.0, File-System: btrfs, Screen Resolution: 1024x768, System Layer: KVM With kvm default cpu layout: Processor: 8 x Intel Core (Haswell no TSX IBRS) (8 Cores), Motherboard: QEMU Standard PC (Q35 + ICH9 2009) (0.0.0 BIOS), Chipset: Intel 82G33/G31/P35/P31 + ICH9, Memory: 8GB, Disk: 20GB, Graphics: Red Hat QXL paravirtual graphic card, Audio: QEMU Generic, Network: Red Hat Virtio device OS: Arch Linux, Kernel: 5.13.10-arch1-1 (x86_64), Compiler: GCC 11.1.0, File-System: btrfs, Screen Resolution: 1024x768, System Layer: KVM Timed Linux Kernel Compilation 5.10.20 Time To Compile Seconds < Lower Is Better Regular CPU setup I always do. . 290.29 |====================================== With kvm default cpu layout .... 290.32 |======================================