Brendan Gregg

JULY 4, 2021

AWS Graviton2); for memory with the arrival of DDR5 and High Bandwidth Memory (HBM) on-processor; for storage including new uses for 3D Xpoint as a 3D NAND accelerator; for networking with the rise of QUIC and eXpress Data Path (XDP); and so on. Ford, et al., “TCP

Performance 52

Performance Latency Hardware Storage 52

Brendan Gregg

FEBRUARY 28, 2023

My personal opinion is that I don't see a widespread need for more capacity given horizontal scaling and servers that can already exceed 1 Tbyte of DRAM; bandwidth is also helpful, but I'd be concerned about the increased latency for adding a hop to more memory. Ford, et al., “TCP

Performance 52

Performance Latency Cache Virtualization 52

SQL Performance

APRIL 8, 2019

Back on December 5, 2017, Microsoft announced that they were using AMD EPYC 7551 processors in their storage-optimized Lv2-Series virtual machines. They feature low latency, local NVMe storage that can directly leverage the 128 PCIe 3.0 Since then, Microsoft has changed the naming of this series to Lsv2. Memory (GiB).

Azure 42

Azure Virtualization Storage Benchmarking 42

Alex Russell

OCTOBER 22, 2017

— Alex Russell (@slightlylate) October 4, 2017. It simulates a link with a 400ms RTT and 400-600Kbps of throughput (plus latency variability and simulated packet loss). Simulated packet loss and variable latency, however, can make benchmarking extremely difficult and slow. Maybe "ambush by JS"? First Load.

Performance 74

Performance Network Benchmarking Mobile 74

Alex Russell

APRIL 29, 2021

Chrome has missed several APIs for 3+ years: Storage Access API. WebGL 2 launched for other platforms on Chrome and Firefox in 2017. For heavily latency-sensitive use-cases like WebXR, this is a critical component in delivering a good experience. Where Chrome Has Lagged. The underlying graphics capabilities from OpenGL ES 3.0

Media 145

Media Games Education Engineering 145

Alex Russell

MARCH 6, 2021

TL;DR: A lot has changed since 2017 when we last estimated a global baseline resource per-page resource budget of 130-170KiB. A then-representative $200USD device had 4-8 slow (in-order, low-cache) cores, ~2GiB of RAM, and relatively slow MLC NAND flash storage. The Moto G4 , for example. Here begins our 2021 adventure. Hard Reset.

Performance 127

Performance Network Mobile Metrics 127

Smashing Magazine

JANUARY 7, 2019

Estimated Input Latency tells us if we are hitting that threshold, and ideally, it should be below 50ms. To optimize storage interally, you could use Dropbox’s new Lepton format for losslessly compressing JPEGs by an average of 22%. Alex Danilo has explained WebAssembly and how it works at his Google I/O 2017 talk. Bundle Buddy.

Performance 111

Performance Cache Network Metrics 111