Smashing Magazine

OCTOBER 27, 2021

The eye-tracking methodology can be extremely valuable for usability tests since it records the journey without interfering with the users’ natural behavior. Imagine, for example, that you test a prototype but discover that users are not interacting with the interface how they are supposed to. Mariana Macedo. 2021-10-27T10:00:00+00:00.

Mobile 112

Mobile Website Hardware Social Media 112

The Morning Paper

OCTOBER 1, 2020

That app is subject to “voluminous (public) user feedback”, and in the 2014 floating-point based calculator, bug reports relating to inaccurate results, unnecessary zeroes, and the like. For calculators, spreadsheets, and many other applications we don’t need the raw performance of hardware floating point operations. Deciding equality.

Java 143

Java Hardware Open Source Testing 143

SQL Server According to Bob

SEPTEMBER 26, 2016

When we released Always On Availability Groups in SQL Server 2012 as a new and powerful way to achieve high availability, hardware environments included NUMA machines with low-end multi-core processors and SATA and SAN drives for storage (some SSDs). As we moved towards SQL Server 2014, the pace of hardware accelerated.

Availability 40

Availability Servers Hardware Benchmarking 40

SQL Server According to Bob

JUNE 3, 2016

My development collogues and I are starting a regular blog series, outlining the vast range of scalability improvements, allowing SQL Server 2016 to run across a wide array of hardware configurations, faster and better than previous releases of SQL Server. The following table is taken from an ASP.NET, session state cache, stress test.

Hardware 40

Hardware Software Engineering Transportation Scalability 40

Brendan Gregg

NOVEMBER 28, 2017

Hardware virtualization for cloud computing has come a long way, improving performance using technologies such as VT-x, SR-IOV, VT-d, NVMe, and APICv. The latest AWS hypervisor, Nitro, uses everything to provide a new hardware-assisted hypervisor that is easy to use and has near bare-metal performance. I'd expect between 0.1%

Virtualization 40

Virtualization AWS Hardware Storage 40

Alex Russell

APRIL 29, 2021

Thanks to the Web Platform Tests project and wpt.fyi , we have the makings of an answer for the first: Tests that fail only in a given browser. wpt.fyi 's new Compat 2021 dashboard narrows this full range of tests to a subset chosen to represent the most painful compatibility bugs : Stable-channel Compat 2021 results over time.

Media 145

Media Games Education Engineering 145

All Things Distributed

DECEMBER 12, 2018

They started using AWS in 2014 after a decision to move away from outsourcing without having to build on-premises infrastructure, in an initiative to restart innovation in-house after a hiatus spanning several years. After the move to the AWS Cloud, the company now has a way to develop and test solutions quickly and at a low cost.

AWS 124

AWS Cloud Games Serverless 124

Brendan Gregg

SEPTEMBER 25, 2021

These strange questions came to the fore back in 2014 when Netflix was switching services from CentOS Linux to Ubuntu, and I helped debug several weird performance issues including one I'll describe here. As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI.

Speed 52

Speed Java AWS Virtualization 52

Brendan Gregg

SEPTEMBER 25, 2021

These strange questions came to the fore back in 2014 when Netflix was switching services from CentOS Linux to Ubuntu, and I helped debug several weird performance issues including one I'll describe here. As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI.

Speed 40

Speed Java AWS Virtualization 40

SQL Performance

JUNE 21, 2019

Managed Instance sets a max server memory value based on the deployed tier, however when I tested resizing the environment, the max memory value was not dynamically changed. For SQL Server 2008R – 2014, you could lower this threshold using trace flag 2371. With modern hardware, the cost estimation of 5 is outdated.

Servers 49

Servers Azure Hardware Database 49

SQL Server According to Bob

JUNE 3, 2016

The following chart shows the same 1TB database testing. Use SQL Server Management Studio (SSMS) or your favorite query editor to connect to a SQL Server 2012 or 2014 instance. On the same hardware/machine repeat steps 1 thru 3 using an instance of SQL Server 2016 CTP 3.0 SQL Server 2014. CheckScanner = New design.

Hardware 40

Hardware Cache Servers Software Engineering 40

Alex Russell

MARCH 6, 2021

Devices and networks have evolved too: Alex Russell @slightlylate An update on mobile CPUs and the Performance Inequality Gap: Mid-tier Android devices (~$300) now get the single-core performance of a 2014 iPhone and the multi-core perf of a 2015 iPhone. Hardware Past As Performance Prologue. Mind The Gap.

Performance 124

Performance Network Cache Metrics 124

All Things Distributed

JULY 20, 2015

To be robust and scalable, this key/value store needs to be distributed for durability and availability, to protect against network partitions or hardware failures. So around the end of 2014, the engineering team started to explore moving towards a microservices architecture using containers. containers stopping and starting).

Latency 166

Latency Architecture AWS Open Source 166

Tim Kadlec

SEPTEMBER 25, 2014

For this test, I decided to profile just jQuery 2.1.1, The results above are based on the median times taken from 20 tests per browser/device combination. The results above are based on the median times taken from 20 tests per browser/device combination. Macbook Air (2014). Macbook Air (2014). Macbook Air (2014).

Latency 41

Latency Google Hardware Servers 41

SQL Performance

MARCH 17, 2020

Back in 2014, I wrote an article called Performance Tuning the Whole Query Plan. Test Environment. Each test result represents the best of ten runs, with all required data and index pages in memory. Cost" column shows the optimizer's cost estimate for each query as reported on the test system. Final Thoughts.

Servers 86

Servers Tuning Database Efficiency 86

Brendan Gregg

SEPTEMBER 5, 2017

We're now testing container hosts in production on btrfs, instead of ZFS. 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).

Virtualization 76

Virtualization AWS Engineering Hardware 76

Smashing Magazine

FEBRUARY 5, 2019

Although modern iOS hardware is powerful enough to handle many intensive and complex tasks, the device could still feel unresponsive if you are not careful about how your app performs. This is mentioned briefly in the WWDC 2014 presentation “ Platforms State of the Union ”, around 01:21:56.). 2019-02-05T13:00:00+01:00.

Performance 76

Performance Energy Operating System Code 76

SQL Performance

MARCH 8, 2021

SQL Server 2014 SP2 and later produce runtime (“actual”) execution plans that can include elapsed time and CPU usage for each execution plan operator (see KB3170113 and this blog post by Pedro Lopes). Interpreting these numbers is not always as straightforward as one might expect. The clock keeps running at the same rate even during sleep.

Servers 95

Servers Tuning Architecture Processing 95