space below. The extra column contains more helpful tools: Layout contains information about the box model properties of the element. Note that flex and grid do not work yet. Computed, which contains all the can run unit tests with ./mach test-unit . Example calls: Running the whole test-suite can be very memory intensive, you can dampen this behaviour somewhat with with restricting the amount of compiled crates Servo's runs: Interval Profiling TSV Profiling Generating Timelines Built-in sampling profiler Memory Profiling Using macOS Instruments Interval Profiling Using the -p option followed by a number (time