The Microsoft Edge team measured the average power consumption of the CPU, GPU, and Wifi antenna while Microsoft Edge, Chrome, and Firefox ran a representative set of user activities in each browser, automated through WebDriver.
These tests were done on four Surface Books running the Windows 10 Creator's Update (build 15063) and connected to the Internet through Wifi. Actual power consumption of the CPU, GPU, and Wifi antenna were measured using onboard Maxim chips, and read through Windows Performance Recorder.
The total CPU, GPU, and Wifi antenna power consumption was measured on the same workload using Chrome, Firefox, and Microsoft Edge, running on the Windows 10 Creator's Update (15063). Based on an average of at least 16 iterations per browser, Microsoft Edge used:
The test was performed on four separate Surface Book laptops running the Windows 10 Creator's Update (build 15063). These computers were configured to the following settings, to increase consistency between measures and reduce tasks that may start during the measurement and interfere with the results, while still representing a realistic user setup:
|Windows 10 Pro 15063.0
|Microsoft Edge 40.15063.0.0
|Google Chrome 57.0.2987.133 (64-bit)
|Firefox 52.0.1 (32-bit)
|i5-6300U @ 2.4GHz 2.5GHz
|Intel HD Graphics 520
Each browser was automated using WebDriver, a cross-platform tool designed for automating web browsing, and implemented by the major browsers. While the power draw was being measured, WebDriver executed the following activities:
Note that pauses are included throughout this workload, but are not included in this description for simplicity.
The code used to execute the test can be found on Github.
For each browser, a minimum of 16 iterations were recorded, and the average between all iterations reported. Iterations for each browser were approximately spread between all four devices to ensure fair comparisons.
Power was measured on the Surface Book because it has integrated hardware instrumentation that's able to measure the real power consumption of the CPU, GPU and Wifi antenna while the automation is being executed. This is done using the Maxim 34407 Power Accumulator chip. The results of the Maxim chips were read using the tool "Windows Performance Recorder". Windows Performance Recorder was configured to independently measure the instantaneous power consumption of the CPU, GPU, and Wifi antenna, and record periodic measurements in a trace file.