Brendan Gregg

SEPTEMBER 25, 2021

Since instances of both CentOS and Ubuntu were running in parallel, I could collect flame graphs at the same time (same time-of-day traffic mix) and compare them side by side. As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI. But I'm not completely sure.

Speed 40

Speed Java AWS Virtualization 40

Alex Russell

JULY 14, 2021

Meanwhile, on Android, the #2 and #3 sources of web traffic do not respect browser choice. On Android today and early iOS versions, WebViews allow embedders to observe and modify all network traffic (regardless of encryption). Hardware access APIs, notably: Geolocation. Basic navigation and window management features to (e.g.

Google 121

Google Mobile Engineering Internet 121

Brendan Gregg

SEPTEMBER 5, 2017

Linux has been adding tracing technologies over the years: kprobes (kernel dynamic tracing), uprobes (user-level dynamic tracing), tracepoints (static tracing), and perf_events (profiling and hardware counters). In a test environment, I've seen several more Linux panics in the past three years.

Virtualization 76

Virtualization AWS Engineering Hardware 76

Smashing Magazine

AUGUST 22, 2021

Many network interface controllers (NICs) even have built-in hardware-offload features for TCP. This is with the recent Windows updates, which made UDP faster (for a full comparison, UDP throughput on that system was 19.5 We can also expect QUIC-specific hardware to become available. Gbps, compared to 11.85

Performance 107

Performance Network Latency Servers 107

The Morning Paper

NOVEMBER 15, 2020

When used in prevention mode (IPS), this all has to happen inline over incoming traffic to block any traffic with suspicious signatures. The baseline for comparison is Snort 3.0 , “the most powerful IPS in the world” according to the Snort website. This makes the whole system latency sensitive. MPSM: First things first.

Servers 128

Servers Hardware Latency Design 128

Smashing Magazine

JANUARY 11, 2021

Alternatively, you can also use: Addy Osmani’s Chrome UX Report Compare Tool , Speed Scorecard (also provides a revenue impact estimator), Real User Experience Test Comparison or SiteSpeed CI (based on synthetic testing). CrUX generates an overview of performance distributions over time, with traffic collected from Google Chrome users.

Performance 145

Performance Cache Media Metrics 145

Smashing Magazine

JANUARY 6, 2020

Alternatively, you can also use Speed Scorecard (also provides a revenue impact estimator), Real User Experience Test Comparison or SiteSpeed CI (based on synthetic testing). Paddy Ganti’s script constructs two URLs (one normal and one blocking the ads), prompts the generation of a video comparison via WebPageTest and reports a delta.

Performance 145

Performance Cache Network Metrics 145

Smashing Magazine

JANUARY 7, 2019

To get a good first impression of how your competitors perform, you can use Chrome UX Report ( CrUX , a ready-made RUM data set, video introduction by Ilya Grigorik), Speed Scorecard (also provides a revenue impact estimator), Real User Experience Test Comparison or SiteSpeed CI (based on synthetic testing). Large preview ).

Performance 104

Performance Cache Metrics Network 104