Performance Matters

Tag: performance

Aug 19, 2020
Ice Lake AVX-512 Downclocking
Examining the extent of AVX related downclocking on Intel's Ice Lake CPU
Jul 6, 2020
A Concurrency Cost Hierarchy
Concurrent operations can be grouped relatively neatly into categories based on their cost
Jan 20, 2020
The Hunt for the Fastest Zero
Unexpected performance deviations depending on how you spell zero.
Jan 17, 2020
Gathering Intel on Intel AVX-512 Transitions
Investigating some details of SIMD related frequency transitions on Intel CPUs.
Dec 5, 2019
A Note on Mask Registers
Some mostly too-low-level-to-care-about hardware details of the mask registers introduced in AVX-512.
Nov 19, 2019
Clang-format Tanks Performance
Can using clang-format make your code slower? Kind of.
Aug 26, 2019
Incrementing Vectors
Incrementing vector<T> for various T may not perform as you'd expect.
Aug 20, 2019
Where Do Interrupts Happen?
Trying to determine exactly where asynchronous interrupts are delivered on Intel CPUs.
Jun 11, 2019
Performance Speed Limits
A laundry list of speed limits that your code can't exceed.
May 22, 2019
Beating Up on Qsort
Building sort functions faster than what the C and C++ standard libraries offer.
Mar 19, 2019
What Has Your Microcode Done for You Lately?
CPU microcode updates can cause silent and dramatic performance changes.