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Category: Battery life

Archiving AIXPRT and CloudXPRT

Some of our readers have been following the XPRTs since the early days, and they may remember using legacy versions of benchmarks such as HDXPRT 2014 or WebXPRT 2013. For many years, whenever we released a new version of a benchmark, we would maintain a link to the previous version on the benchmark’s main page. However, as interest in the older versions understandably waned and we stopped formally supporting them, many of those legacy XPRTs stopped working on the latest versions of the operating systems or browsers that we designed them to test. While we wanted to continue to provide a way for users to access those legacy XPRTs, we also wanted to avoid potential confusion for new users who might see links to old versions on our site. We decided that the best solution was to archive older tests in a separate section of the site—the XPRT archive.

Recently, as we discussed XPRT plans for 2025, it became clear that we needed to add AIXPRT and CloudXPRT to the archive. Both benchmarks represent landmark efforts toward our ongoing goal of providing cutting-edge performance assessment tools, but even though a few tech press publications and OEM labs experimented with them, neither benchmark gained enough widespread adoption to justify their continued support. As a result, we decided to focus our resources elsewhere and halt development on both benchmarks. Since then, ongoing updates to their respective software components and target platforms have rendered them largely unusable. By archiving both benchmarks, we hope to avoid any future confusion for visitors who may otherwise try to use them.

Over the coming weeks, we’ll be moving the AIXPRT and CloudXPRT installation packages to the XPRT archive page. We’re grateful to everyone who has used AIXPRT and CloudXPRT in the past, and we apologize for any inconvenience this change may cause.

If you have any questions or concerns about access to either of these benchmarks—or about anything else related to the XPRTs, please let us know

Justin

The XPRTs: What would you like to see in 2025?

If you’re a new follower of the XPRT family of benchmarks, you may not be aware of one of the characteristics of the XPRTs that sets them apart from many benchmarking efforts—our openness and commitment to valuing the feedback of tech journalists, lab engineers, and anyone else that uses the XPRTs on a regular basis. That feedback helps us to ensure that as the XPRTs grow and evolve, the resources we offer will continue to meet the needs of those that use them.

In the past, user feedback has influenced specific aspects of our benchmarks, such as the length of test runs, UI features, results presentation, and the addition or subtraction of specific workloads. More broadly, we have also received suggestions for entirely new XPRTs and ways we might target emerging technologies or industry use cases.

As we look forward to what’s in store for the XPRTs in 2025, we’d love to hear your ideas about new XPRTs—or new features for existing XPRTs. Are you aware of hardware form factors, software platforms, new technologies, or prominent applications that are difficult or impossible to evaluate using existing performance benchmarks? Should we incorporate additional or different technologies into existing XPRTs through new workloads? Do you have suggestions for ways to improve any of the XPRTs or XPRT-related tools, such as results viewers?

We’re especially interested in your thoughts about the next steps for WebXPRT. If our recent blog posts about the potential addition of an AI-focused auxiliary workload, what a WebXPRT battery life test would entail, or possible WebAssembly-based test scenarios have piqued your interest, we’d love to hear your thoughts!

We’re genuinely interested in your answers to these questions and any other ideas you have, so please feel free to contact us. We look forward to hearing your thoughts and working together to figure out how they could help shape the XPRTs in 2025!

Justin

XPRT possibilities with ChromeOS Flex

Recently, Tom’s Guide published an interesting article about how they used ChromeOS Flex to turn a ten-year-old Apple MacBook Pro into a functioning Chromebook by replacing the laptop’s macOS operating system with ChromeOS. ChromeOS Flex is a free Google tool that allows users to create a bootable USB drive that they can then use to install ChromeOS on a wide variety of hardware platforms that traditionally run other operating systems such as macOS or Windows. Because ChromeOS is a cloud-first, relatively low-overhead operating system, the ChromeOS Flex option could breathe new life into an old laptop that you have lying around.

Never having encountered a MacBook Pro with ChromeOS, we were interested to learn about Tom’s experience running XPRT benchmarks in this new environment. WebXPRT 4, WebXPRT 3, and the CrXPRT 2 performance test apparently ran without any issues, but we have not yet seen a CrXPRT 2 battery life result from a ChromeOS Flex environment. We plan to experiment with this soon.

We were happy to publish the results on our site, and will consider any ChromeOS Flex results we receive for publication. If you submit results from ChromeOS Flex testing, we ask that you use the “Additional information” field in the results submission form to clarify that you ran the tests in a ChromeOS Flex environment. This will prevent any possible confusion when we see a submission that lists a traditional macOS or Windows hardware platform along with a ChromeOS version number.

Do you have experience running CrXPRT or WebXPRT with ChromeOS Flex? We’d love to hear about it!

Justin

An update on Chrome OS support for CrXPRT

In March, we discussed the Chrome OS team’s plan to end support for Chrome apps in June and instead focus their efforts on Chrome extensions and Progressive Web Apps. After receiving feedback on their published timeline, the Chrome OS team decided to extend Chrome app support for Enterprise and Education account customers through January 2025. Because we publish our Chrome app (CrXPRT) through a private BenchmarkXPRT developer account, and because we have not seen any further updates to the support timeline, we don’t assume that the support extension will apply to CrXPRT.

Since June has come and gone, and the support extension probably does not apply to our account, we do not expect to be able to publish any future fixes or updates for CrXPRT. As of now, and up through Chrome 105, the CrXPRT 2 performance and battery life tests are still working without a hitch. We will continue to run the benchmark on a regular basis to monitor functionality, and we will disclose any future issues here in the blog and on CrXPRT.com. We hope the app will continue to run both performance and battery life tests well into the future. However, given the frequency of Chrome updates, it’s difficult for us to predict how long the benchmark will remain viable.

As we mentioned back in March, we hope to begin development of an all-new Chrome OS XPRT benchmark by the end of this year. We’ll discuss that prospect in more detail in future blog posts, but if you have ideas about the types of features or workloads you’d like to see in a new Chrome OS benchmark, please let us know!

Justin

Chrome OS support for CrXPRT apps ends in June 2022

Last March, we discussed the Chrome OS team’s original announcement that they would be phasing out support for Chrome Apps altogether in June 2021, and would shift their focus to Chrome extensions and Progressive Web Apps. The Chrome OS team eventually extended support for existing Chrome Apps through June 2022, but as of this week, we see no indication that they will further extend support for Chrome Apps published with general developer accounts. If the end-of-life schedule for Chrome Apps does not change in the next few months, both CrXPRT 2 and CrXPRT 2015 will stop working on new versions of Chrome OS at some point in June.

To maintain CrXPRT functionality past June, we would need to rebuild the app completely—either as a Progressive Web App or in some other form. For this reason, we want to reassess our approach to Chrome OS testing, and investigate which features and technologies to include in a new Chrome OS benchmark. Our current goal is to gather feedback and conduct exploratory research over the next few months, and begin developing an all-new Chrome OS benchmark for publication by the end of the year.

While we will discuss ideas for this new Chrome OS benchmark in future blog posts, we welcome ideas from CrXPRT users now. What features or workloads would you like the new benchmark to retain? Would you like us to remove any components from the existing benchmark? Does the battery life test in its current form suit your needs? If you have any thoughts about these questions or any other aspects of Chrome OS benchmarking, please let us know!

Justin

Why we don’t control screen brightness during CrXPRT 2 battery life tests

Recently, we had a discussion with a community member about why we no longer recommend specific screen brightness settings during CrXPRT 2 battery life tests. In the CrXPRT 2015 user manual, we recommended setting the test system’s screen brightness to 200 nits. Because the amount of power that a system directs to screen brightness can have a significant impact on battery life, we believed that pegging screen brightness to a common standard for all test systems would yield apple-to-apples comparisons.

After extensive experience with CrXPRT 2015 testing, we decided to not recommend a standard screen brightness with CrXPRT 2, for the following reasons:

  • A significant number of Chromebooks cannot produce a screen brightness of 200 nits. A few higher-end models can do so, but they are not representative of most Chromebooks. Some Chromebooks, especially those that many school districts and corporations purchase in bulk, cannot produce a brightness of even 100 nits.
  • Because of the point above, adjusting screen brightness would not represent real-life conditions for most Chromebooks, and the battery life results could mislead consumers who want to know the battery life they can expect with default out-of-box settings.
  • Most testers, and even some labs, do not have light meters, and the simple brightness percentages that the operating system reports produce different degrees of brightness on different systems. For testers without light meters, a standardized screen brightness recommendation could discourage them from running the test.
  • The brightness controls for some low-end Chromebooks lack the fine-tuning capability that is necessary to standardize brightness between systems. In those cases, an increase or decrease of one notch can swing brightness by 20 to 30 nits in either direction. This could also discourage testing by leading people to believe that they lack the capability to correctly run the test.

In situations where testers want to compare battery life using standardized screen brightness, we recommend using light meters to set the brightness levels as closely as possible. If the brightness levels between systems vary by more than few nits, and if the levels vary significantly from out-of-box settings, the publication of any resulting battery life results should include a full disclosure and explanation of test conditions.

For the majority of testers without light meters, running the CrXPRT 2 battery life test with default screen brightness settings on each system provides a reliable and accurate estimate of the type of real-world, out-of-box battery life consumers can expect.

If you have any questions or comments about the CrXPRT 2 battery life test, please feel free to contact us!

Justin

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