Selenium Browser Spectre Meltdown
Intel Core i7-8086K testing with a ASUS PRIME Z370-A (1802 BIOS) and Intel UHD 630 3GB on Ubuntu 18.10 via the Phoronix Test Suite.


No Mitigations: 

	Processor: Intel Core i7-8086K @ 5.00GHz (6 Cores / 12 Threads), Motherboard: ASUS PRIME Z370-A (1802 BIOS), Chipset: Intel 8th Gen Core, Memory: 8192MB, Disk: 118GB INTEL SSDPEK1W120GA, Graphics: Intel UHD 630 3GB (1200MHz), Audio: Realtek ALC1220, Monitor: DELL P2415Q, Network: Intel I219-V

	OS: Ubuntu 18.10, Kernel: 4.18.0-16-generic (x86_64), Desktop: GNOME Shell 3.30.2, Display Server: X Server 1.20.1, Display Driver: modesetting 1.20.1, OpenGL: 4.5 Mesa 18.2.2, Vulkan: 1.1.80, Compiler: GCC 8.2.0, File-System: ext4, Screen Resolution: 3840x2160

No Mitigations + No Site Isolation: 

	Processor: Intel Core i7-8086K @ 5.00GHz (6 Cores / 12 Threads), Motherboard: ASUS PRIME Z370-A (1802 BIOS), Chipset: Intel 8th Gen Core, Memory: 8192MB, Disk: 118GB INTEL SSDPEK1W120GA, Graphics: Intel UHD 630 3GB (1200MHz), Audio: Realtek ALC1220, Monitor: DELL P2415Q, Network: Intel I219-V

	OS: Ubuntu 18.10, Kernel: 4.18.0-16-generic (x86_64), Desktop: GNOME Shell 3.30.2, Display Server: X Server 1.20.1, Display Driver: modesetting 1.20.1, OpenGL: 4.5 Mesa 18.2.2, Vulkan: 1.1.80, Compiler: GCC 8.2.0, File-System: ext4, Screen Resolution: 3840x2160

Default Mitigations: 

	Processor: Intel Core i7-8086K @ 5.00GHz (6 Cores / 12 Threads), Motherboard: ASUS PRIME Z370-A (1802 BIOS), Chipset: Intel 8th Gen Core, Memory: 8192MB, Disk: 118GB INTEL SSDPEK1W120GA, Graphics: Intel UHD 630 3GB (1200MHz), Audio: Realtek ALC1220, Monitor: DELL P2415Q, Network: Intel I219-V

	OS: Ubuntu 18.10, Kernel: 4.18.0-16-generic (x86_64), Desktop: GNOME Shell 3.30.2, Display Server: X Server 1.20.1, Display Driver: modesetting 1.20.1, OpenGL: 4.5 Mesa 18.2.2, Vulkan: 1.1.80, Compiler: GCC 8.2.0, File-System: ext4, Screen Resolution: 3840x2160

Default Mitigations + No Site Isolation: 

	Processor: Intel Core i7-8086K @ 5.00GHz (6 Cores / 12 Threads), Motherboard: ASUS PRIME Z370-A (1802 BIOS), Chipset: Intel 8th Gen Core, Memory: 8192MB, Disk: 118GB INTEL SSDPEK1W120GA, Graphics: Intel UHD 630 3GB (1200MHz), Audio: Realtek ALC1220, Monitor: DELL P2415Q, Network: Intel I219-V

	OS: Ubuntu 18.10, Kernel: 4.18.0-16-generic (x86_64), Desktop: GNOME Shell 3.30.2, Display Server: X Server 1.20.1, Display Driver: modesetting 1.20.1, OpenGL: 4.5 Mesa 18.2.2, Vulkan: 1.1.80, Compiler: GCC 8.2.0, File-System: ext4, Screen Resolution: 3840x2160


Selenium
Benchmark: ARES-6 - Browser: Google Chrome
ms < Lower Is Better
No Mitigations .......................... 16.18 |=====================
No Mitigations + No Site Isolation ...... 17.58 |======================
Default Mitigations ..................... 23.54 |==============================
Default Mitigations + No Site Isolation . 23.43 |==============================


Selenium
Benchmark: Octane - Browser: Google Chrome
Geometric Mean > Higher Is Better
No Mitigations .......................... 60180 |==============================
No Mitigations + No Site Isolation ...... 52869 |==========================
Default Mitigations ..................... 43856 |======================
Default Mitigations + No Site Isolation . 43857 |======================


Selenium
Benchmark: WebXPRT - Browser: Google Chrome
Score > Higher Is Better
No Mitigations .......................... 272 |================================
No Mitigations + No Site Isolation ...... 239 |============================
Default Mitigations ..................... 215 |=========================
Default Mitigations + No Site Isolation . 215 |=========================


Selenium
Benchmark: Basemark - Browser: Google Chrome
Overall Score > Higher Is Better
No Mitigations .......................... 665 |================================
No Mitigations + No Site Isolation ...... 654 |===============================
Default Mitigations ..................... 603 |=============================
Default Mitigations + No Site Isolation . 568 |===========================


Selenium
Benchmark: Jetstream - Browser: Google Chrome
Score > Higher Is Better
No Mitigations .......................... 276 |================================
No Mitigations + No Site Isolation ...... 272 |================================
Default Mitigations ..................... 205 |========================
Default Mitigations + No Site Isolation . 206 |========================


Selenium
Benchmark: CanvasMark - Browser: Google Chrome
Score > Higher Is Better
No Mitigations .......................... 5056 |===============================
No Mitigations + No Site Isolation ...... 5049 |===============================
Default Mitigations ..................... 5056 |===============================
Default Mitigations + No Site Isolation . 5038 |===============================


Selenium
Benchmark: MotionMark - Browser: Google Chrome
Score > Higher Is Better
No Mitigations .......................... 1 |==================================
No Mitigations + No Site Isolation ...... 1 |==================================
Default Mitigations ..................... 1 |==================================
Default Mitigations + No Site Isolation . 1 |==================================


Selenium
Benchmark: Speedometer - Browser: Google Chrome
Runs Per Minute > Higher Is Better
No Mitigations .......................... 134 |================================
No Mitigations + No Site Isolation ...... 133 |================================
Default Mitigations ..................... 106 |=========================
Default Mitigations + No Site Isolation . 105 |=========================