The Netflix TechBlog

JUNE 13, 2023

Our previous blog post presented replay traffic testing — a crucial instrument in our toolkit that allows us to implement these transformations with precision and reliability. Compared to replay testing, canaries allow us to extend the validation scope beyond the service level.

Traffic 285

Traffic Metrics Systems Strategy 285

Percona

MARCH 20, 2023

micro) The tests We will have very simple test cases. The second test will define how well the increasing load is served inside the previously identified range. Let us take a look also the latency: Here the situation starts to be a little bit more complicated. For documentation, the sysbench commands are: Test1 sysbench./src/lua/windmills/oltp_read.lua

Games 141

Games Latency Traffic Cache 141

Dynatrace

FEBRUARY 15, 2023

SREs use Service-Level Indicators (SLI) to see the complete picture of service availability, latency, performance, and capacity across various systems, especially revenue-critical systems. This includes executing tests, running Dynatrace Synthetic checks, or creating tickets.

DevOps 246

DevOps Latency Traffic Best Practices 246

Scalegrid

OCTOBER 17, 2019

While there is plenty of well-documented benefits to using a connection pooler, there are some arguments to be made against using one: Introducing a middleware in the communication inevitably introduces some latency. Our tests show that even a small number of clients can significantly benefit from using a connection pooler.

Architecture 200

Architecture Database Latency Servers 200

Dynatrace

JANUARY 31, 2024

For production models, this provides observability of service-level agreement (SLA) performance metrics, such as token consumption, latency, availability, response time, and error count. To observe model drift and accuracy, companies can use holdout evaluation sets for comparison to model data.

Cache 276

Cache Azure Infrastructure Monitoring 276

Dynatrace

SEPTEMBER 25, 2019

Citrix platform performance—optimize your Citrix landscape with insights into user load and screen latency per server. Comparison of these metrics between VDAs characterizes load balancing efficiency. Citrix latency represents the end-to-end “screen lag” experienced by a server’s users. Citrix VDA. SAP server. Citrix VDA.

Latency 164

Latency Performance Virtualization Infrastructure 164

CSS Wizardry

AUGUST 13, 2019

I was doing some cursory research and running a few tests against a potential client’s site so as to get a good understanding of the shape of things before we were to work together. Although this response has a 0B filesize, we will always take the latency hit on every single page view (and this response is basically 100% latency).

Latency 213

Latency Cache Strategy Media 213

The Netflix TechBlog

JANUARY 24, 2022

Technically, “performance” metrics are those relating to the responsiveness or latency of the app, including start up time. Why do we run Performance Tests on commits? By running performance tests against every commit (pre- and post-merge), we can detect potentially regressive commits earlier. What are the Performance Tests?

Performance 208

Performance Performance Testing Metrics Testing 208

Scalegrid

NOVEMBER 4, 2024

For a more detailed comparison of performance features between different versions, refer to: [link] Benchmarking Methodology Sysbench Overview Sysbench is a versatile, open-source benchmarking tool ideal for testing OLTP (Online Transaction Processing) database workloads. You can access the benchmark here: [link]. large instances.

Benchmarking 130

Benchmarking AWS Tuning Metrics 130

The Netflix TechBlog

MARCH 13, 2020

Compared to the most recent master version of libaom (AV1 reference software), SVT-AV1 is similar in compression efficiency and at the same time achieves significantly lower encoding latency on multi-core platforms when using its inherent parallelization capabilities. The testing has been performed on Windows, Linux, and macOS platforms.

Open Source 159

Open Source Efficiency C++ Speed 159

The Netflix TechBlog

NOVEMBER 2, 2021

Perceptual quality measurements are used to drive video encoding optimizations , perform video codec comparisons , carry out A/B testing and optimize streaming QoE decisions to mention a few. This enables us to use our scale to increase throughput and reduce latencies. VQS is called using the measureQuality endpoint.

Media 178

Media Innovation Metrics Latency 178

Percona

MARCH 29, 2023

So, it becomes very important to test for the optimal required use case before implementing it in production. Here, we are going to test snappy and zstd compression with the following configurations. The higher the specified value for zstdCompressionLevel, the higher the compression which is applied.

Storage 130

Storage Network Open Source Latency 130

Dynatrace

JANUARY 31, 2024

In the age of AI, data observability has become foundational and complementary to AI observability, data quality being essential for training and testing AI models. Data observability is crucial to analytics and automation, as business decisions and actions depend on data quality.

DevOps 272

DevOps Analytics Airlines Metrics 272

KeyCDN

FEBRUARY 4, 2021

Using a fast DNS hosting provider ensures there is less latency between the DNS lookup and TTFB. You can test the DNS lookup time and TTFB with a website speed test tool. Visit website DNS hosting providers comparison How do the free DNS providers stack up against the premium DNS services? They do quite well actually.

Cache 134

Cache Website Internet Internet 134

The Morning Paper

JANUARY 30, 2020

Edge servers are the middle ground – more compute power than a mobile device, but with latency of just a few ms. The client MWW combines these estimates with an estimate of the input/output transmission time (latency) to find the worker with the minimum overall execution latency. for the wasm-version.

Mobile 104

Mobile Cloud Latency Games 104

Enprowess

SEPTEMBER 7, 2021

Quick summary : Node vs React Comparison is not correct because both technologies are entirely different things. Node JS vs. React JS Comparison. Unit testing: Node.js has a unit testing framework called Jasmine, which allows unit testing of code during development. Node JS vs. React JS Comparison.

Open Source 52

Open Source Virtualization Programming Servers 52

Scalegrid

MAY 11, 2024

In-Memory Storage Engine, as the name suggests, stores data in memory for faster performance and lower latencies. Feature Comparison: MMAPV1 vs WiredTiger MMAPV1 provides document-level locking that allows for independent updates on different documents in a single collection. released in December 2015.

Storage 130

Storage Engineering Cache Database 130

Percona

DECEMBER 11, 2023

DLVs are particularly advantageous for databases with large allocated storage, high I/O per second (IOPS) requirements, or latency-sensitive workloads. We performed a standard benchmarking test using the sysbench tool to compare the performance of a DLV instance vs a standard RDS MySQL instance, as shared in the following section.

AWS 117

AWS Benchmarking Performance Traffic 117

The Morning Paper

NOVEMBER 15, 2020

This makes the whole system latency sensitive. So we need low latency, but we also need very high throughput: A recurring theme in IDS/IPS literature is the gap between the workloads they need to handle and the capabilities of existing hardware/software implementations. in the paper for details. Headline results.

Servers 128

Servers Hardware Latency Design 128

Smashing Magazine

AUGUST 10, 2023

Running A Page Speed Test: Monitoring vs. Measuring Running A Page Speed Test: Monitoring vs. Measuring Geoff Graham 2023-08-10T08:00:00+00:00 2023-08-10T12:35:05+00:00 This article is sponsored by DebugBear There is no shortage of ways to measure the speed of a webpage. Real usage data would be better, of course.

Speed 85

Speed Monitoring Testing Network 85

Percona

APRIL 7, 2023

Here’s how the same test performed when running Percona Distribution for PostgreSQL 14 on these same servers: Queries: reads Queries: writes Queries: other Queries: total Transactions Latency (95th) MySQL (A) 1584986 1645000 245322 3475308 122277 20137.61 The throughput didn’t double but increased by 57%.

Tuning 145

Tuning Cache Servers Benchmarking 145

The Netflix TechBlog

DECEMBER 2, 2019

Within each of these areas, teams continuously run large-scale A/B experiments to test whether their ideas result in a more seamless experience for members. They need to understand whether there was a meaningful improvement or if their A/B test results were due to noise. But did this difference happen by chance?

Metrics 146

Metrics Strategy Testing Efficiency 146

The Netflix TechBlog

DECEMBER 2, 2019

Within each of these areas, teams continuously run large-scale A/B experiments to test whether their ideas result in a more seamless experience for members. They need to understand whether there was a meaningful improvement or if their A/B test results were due to noise. But did this difference happen by chance?

Metrics 143

Metrics Strategy Testing Efficiency 143

CSS - Tricks

MARCH 16, 2020

In lh.js , you’ll next want to delete the test console.log() and import the Lighthouse module so you can use it in your code. Testing the script at the point should result in a new directory being created. If your latency is higher than 50ms, users may perceive your app as laggy. module called fs (short for "file system").

Google 86

Google Latency Website Metrics 86

Particular Software

SEPTEMBER 20, 2021

Some will claim that any type of RPC communication ends up being faster (meaning it has lower latency) than any equivalent invocation using asynchronous messaging. It’s less of an apples-to-oranges comparison and more like apples-to-orange-sherbet. There are more steps, so the increased latency is easily explained.

Benchmarking 97

Benchmarking Latency Servers Systems 97

The Netflix TechBlog

DECEMBER 2, 2019

Within each of these areas, teams continuously run large-scale A/B experiments to test whether their ideas result in a more seamless experience for members. They need to understand whether there was a meaningful improvement or if their A/B test results were due to noise. But did this difference happen by chance?

Metrics 130

Metrics Strategy Testing Efficiency 130

Highly Scalable

MAY 1, 2012

This approach often leads to heavyweight high-latency analytical processes and poor applicability to realtime use cases. This process is shown in the figure below: It is clear that if sketch is large in comparison with the cardinality of the data set, almost each value will get an independent counter and estimation will precise.

Analytics 191

Analytics Traffic Big Data Efficiency 191

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. There's also a test and println() in the loop to, hopefully, convince the compiler not to optimize-out an otherwise empty loop. This will slow this test a little.) Trying it out: centos$ time java TimeBench. us on Ubuntu.

Speed 103

Speed Java AWS Virtualization 103

Alex Russell

MAY 9, 2022

This is a complex topic, but to borrow from a recent post , web performance expands access to information and services by reducing latency and variance across interactions in a session, with a particular focus on the tail of the distribution (P75+). Consistent performance matters just as much as low average latency.

Performance 99

Performance Latency Metrics Engineering 99

Brendan Gregg

OCTOBER 8, 2018

Screenshot: tracing read latency for PID 181: # bpftrace -e 'kprobe:vfs_read /pid == 30153/ { @start[tid] = nsecs; } kretprobe:vfs_read /@start[tid]/ { @ns = hist(nsecs - @start[tid]); delete(@start[tid]); }'. Here's a comparison for an average-sized DTraceToolkit script (seeksize.d) It's shaping up to be a DTrace version 2.0:

C++ 105

C++ Virtualization Programming Latency 105

The Morning Paper

AUGUST 29, 2019

As it is infeasible to test every OLAP system runnable on AWS, we chose widely-used systems that represented a variety of architectures and cost models. InS does now offer an NVMe variant too, and the authors perform limited testing on that as well. Key findings. erings like Athena provide an alternative “instant on” query service.

Architecture 76

Architecture Cloud Storage Serverless 76

Testsigma

JANUARY 30, 2021

About two decades ago, testing was only limited to the desktop. With the rapidly increasing use of smartphones and ease of access to the internet across the globe, testing has spread across vast platforms. The native and mobile web browser testing is being performed more and more compared to desktop testing.

Mobile 52

Mobile Testing Website Internet 52

HammerDB

JULY 6, 2024

This is a brief post to highlight the metrics to use to do the comparison using a separate hardware platform for illustration purposes. Throughput: events/s (eps): 8162.5668 time elapsed: 300.0356s total number of events: 2449061 Latency (ms): min: 0.35 idle%-99.97 hammerdbcli auto. 95th percentile: 41.10 sum: 23997083.58

C++ 52

C++ Hardware Benchmarking Virtualization 52

KeyCDN

SEPTEMBER 12, 2019

Most of you have probably seen the following Google PageSpeed Insights optimization suggestion at one point or another when running a speed test: By compressing and adjusting the size of … you can save 14.2 Dawn ran a test with the word “plinkyploppitypippity” in the title attribute field and left the alt text empty.

Social Media 106

Social Media Media Google Website 106

Smashing Magazine

MAY 16, 2022

Using that cdn_time duration, the already accessible HTML Time-To-First-Byte value and the origin_time duration, we can determine latency sections more accurately, such as the user latency, the cdn to origin latency, etc. Any solutions here would have to be tested heavily to ensure they don’t hinder performance.

Servers 111

Servers Monitoring Cache Network 111

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

The Morning Paper

MAY 28, 2019

The resulting system can integrate seamlessly into a scikit-learn based development process, and dramatically reduces the total energy usage required for classification with very low latency. Another way of looking at the problem is that each path from the tree root to a leaf corresponds to a unique conjunction of attribute tests.

Energy 52

Energy Hardware Efficiency Architecture 52