Toshiba Chromebook 2 Performance

After all the praise of the last page, this is the one area where the Toshiba Chromebook comes up short. Here I have to take some exception with Intel’s decision to brand some of the formerly Atom as Celeron, as even the older Sandy Bridge, Ivy Bridge, and Haswell Celerons could offer decent performance. Intel’s Atom has a well-deserved reputation for being merely “fast enough”, and it primarily goes up against ARM SoCs these days. However, while performance (at least on the CPU portion) is respectable compared to ARM, it’s a pretty sizeable step down from the Celeron 2955U, never mind the upcoming Broadwell-U Celeron 3205U. And if the CPU performance is somewhat questionable, the GPU results are downright poor. Here’s the performance of the Toshiba Chromebook 2 in numbers, keeping in mind that there really aren’t a lot of Chrome OS benchmarks available.

WebXPRT (Stock Browser)

Mozilla Kraken (Stock Browser)

Google Octane v1 (Stock Browser)

SunSpider 1.0.2 (Stock Browser)

Additional Performance Results
Acer C720 Acer CB13 Toshiba CB35
CrXPRT 96 55 61
CrXPRT Battery (Hours) 8.52 9.9 7.58
OORT Online (WebGL) 3270 4010 1420
Spacerocks (WebGL - FPS) 18 30 11
WiFi FTP Download (Mbps) 100 115 175

The CPU of the N2840 is able to surpass most ARM processors (at least, those that we’ve tested) in terms of performance. The problem is that the GPU is quite a bit slower than the competition. Take NVIDIA’s Tegra K1 SoC, which pairs one of the fastest SoC GPUs with a respectable ARM-based CPU; by contrast, the N2840’s CPU is generally faster than the Tegra K1’s CPU, but the GPU ends up being substantially slower – less than half the performance by our numbers. For a browser-centric OS like Chrome OS, I’m not sure it matters all that much, but as we discussed earlier there are cases where graphics performance still matters – like YouTube 1080p60 content.

Of course, outside of 1080p60 and a few games, I continue to struggle to find a need for faster graphics performance on Chromebooks. If you have similar feelings the Atom N2840 should be a reasonable compromise. In Octane, Kraken, and SunSpider, the N2840 consistently beats the Tegra K1 and in some cases it even ties (roughly) Apple’s A8X. However, we still have to account for the Celeron 2955U that pretty much tops our performance charts – and that’s a nearly two years old processor that is going to be superseded shortly.

As it stands, performance from the Celeron N2840 is significantly lower than what we measured with Celeron 2955U, edging out the Tegra K1 but not by a lot. It’s certainly “fast enough”, just like the Acer Chromebook 13, but compared to the Acer C720 the performance gap is very noticeable. This is why I’m really looking forward to testing the upcoming Acer Chromebook 15 with a Celeron 3205U (or maybe even a Core i3) – performance even when just surfing the web can still matter, especially when viewing webpages like Google Drive.

Tangentially related to performance, it’s worth noting that the Toshiba Chromebook 2 includes 802.11ac WiFi, with a 2x2 spatial stream solution. Over the local network, I was able to copy files at up to 175 Mbps, which beats the Acer CB13’s 115 Mbps and the C720’s 100 Mbps. This testing however was done via FTP transfers to a local system, which may not be the best indication of maximum WiFi performance. It would be great if there was an easier way to connect to local Windows shares, but as far as I can tell that’s not an option.

Toshiba Chromebook 2: A Beautiful Display Toshiba Chromebook 2 Battery Life


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  • w_barath - Thursday, February 12, 2015 - link

    If you use crouton [ ] to run your favourite supported distro under ChromeOS in a chroot, then you can use these tips: [ ] which I posted on the crouton GitHub page.

    This provides you with scaled virtual resolutions from 1280x720 up to 2732x1536, and also frees up between 400 and 700M of RAM, making the experience much more like a native installation. The main limitations of running under ChromeOS are A) lack of native WIFI control from the chroot, and lack of certain kernel modules so for example I'm unable to run the Arduino development stack on the C720, and I've heard that some multi-function storage devices and printers are unsupported, and things like DVB. My Wacom devices are perfectly supported though. Inkscape and Gimp run delightfully. Inkscape at 1920x1080 is a lot more useable than at 1366x768! Fonts are still quite legible at 1821x1024, and Netbeans IDE is a lot more pleasant to share the screen with Firefox at that resolution.
  • jasperjones - Wednesday, February 11, 2015 - link

    Two things regarding your Chromebook reviews:

    1.) Your usual argument is that Chromebooks are suitable for moderate tasks/light users. However, CBs are also interesting for power users (which use it as a secondary/tertiary device). I suspect many power user opt for Linux on CBs. So it would be nice if you commented on Linux compatibility in the reviews. (I know, power users are capable of researching this themselves. Still, it would be nice to have thoughts on this in a concise review.)

    2.) Even for non power users, the issue with Chromebooks is that, due to limited local storage, you are basically forced to rely on "the cloud." I would like to read more about that aspect of the Chrome OS in reviews.
    Can I encrypt my data before uploading it? Or am I forced to give my unencrypted data to Google (and possibly intelligence agencies, too)?
  • savagemike - Wednesday, February 11, 2015 - link

    I always laugh about it being qualified for 'light work' too. A lot of businesses run on Google services and applications. Contrary to much marketing hype you don't need Microsoft Office to get by.
    You'd have no problem running a small business or being part of a big business (depending upon their tool set) or writing the great American novel on a Chromebook. It's quite capable of quite heavy lifting.
  • chlamchowder - Wednesday, February 11, 2015 - link

    I think it all goes back to relying on the internet (probably the most controversial thing about Chromebooks). Privacy is a concern, but speed is too. Fast internet is often ridiculously hard to get or very expensive, unless you're on a university campus or a corporate network. Internet access while commuting is even worse.

    Linux on Chromebooks - Limited local storage would present plenty of problems, and I wouldn't want to compile big projects or edit images on generally weak Chromebook processors. It might be tolerable for web browsing, but Chrome OS gives you that anyways. How is this better than running/dual booting Linux off a $300 laptop (or a refurbished cheaper one)?
  • SM123456 - Saturday, February 14, 2015 - link


    You haven't actually used a Chromebook then.

    An average broadband speed is more than adequate, and other than for video streaming which understandably needs a bandwidth to suit the download bandwidth of the video stream. For people on the move, Chromebooks will also work well on a cell net Internet connections tethered to a mobile phone. For example Gmail and Google Drive, Docs, Sheets etc. have an offline mode which do not require Internet connection, and has transparent syncing to the internet when bandwidth permits. This and the online mode is far more efficient than Windows for syncing up to the Cloud, because unlike Windows applications where you have to download, edit and then upload the whole document file, Cloud based Chrome apps only download and upload the characters on the screen and the keystrokes corresponding to changes. This is how for example Google Docs continually saves your document to the cloud every 3 seconds as you work, which means you will never ever lose more than 3 seconds worth of work on a Chromebook come fire, theft, or damage - even if while you are typing your Chromebook is grabbed by thief or run over by a steam roller in mid sentence, and since the files are redundantly backed up in multiple geographically locations, even fire, earthquake or a tactical nuclear strike won't cause your data to be lost.

    Again, you don't need more than an average broadband speed, and apart from video streaming, it works well on cell-net Internet access tethered to a mobile phone, and you can work offline on most apps that you would use while travelling - Gmail, Docs, Sheets, Google Drive, viewing PDF, Word, Excel, image files, movie and audio files etc. . I don't know where you live, but in all but a very small number of locations, in most countries, Internet broadband connection is not only cheap, but essential for business, leisure, or anything else for that matter - if you can't get an Internet connection, it isn't worth getting a computer or starting a business. Cellnet Internet may be expensive in some places, but in most places they are not expensive for the convenience you get, and these are only required when you are on the move and you want access to the Internet - you would normally use a WiFi router at work and home to access your LAN and Internet at office and home, and one of the many WiFi access points found in restaurants, hotels, airports, airplanes, trains, stations, service stops etc.

    Chromebooks will run all Windows, OSX, and Linux apps out of the box without any setup. The best way to do this is to run them the same way as Chromebooks run all web apps - in the cloud or on a server on the LAN/WLAN - run Windows/Linux/OSX on a hot and heavy mains powered server (or old PC serving that purpose), and use the free Chrome Remote Desktop to connect in remotely. This works very well on an average broadband connection - no lag or stutters. For business/university/school use you would use Ericom Access Now, or an RDP Chrome App to access local servers without having to connect to the Internet
    If access is via the LAN/WLAN alone, it is always lightning quick.

    If you want to run Windows/Linux applications with really high end 3D graphics CAD workstation class graphics, then you need to use virtualised server GPU solutions like servers with nVidia GRID vGPU cards and VMWare/Citrix.

    Using a Chromebook - Acer Chromebook 13 as shown in the first video, beats the living crap in terms of performance out of running it on a $1700 hot, heavy, and noisy high end Windows CAD workstation laptop with a battery life of less than 2.5hrs in CAD use. It simply cannot match the performance of the high end mains powered server and server GPU cards at the back end used by the Chromebook solution, nor the light weight, and the 11 hour in CAD use battery life, security, stability, ease of use, and much lower cost of maintenance and manageability of the Chromebook plus back end server solution.

    Besides that the best way to run Linux is as a server, and the cheapest way to run Windows desktops (in terms of maintenance staff salaries which is horrendously expensive for Windows desktops), and most secure way to run high maintenance Windows desktops is to run it virtualised on a Linux server - and use a Chromebook front end. Linux is a natural as a server, not so good as a local desktop, especially when installed on a low end limited resource Chromebook or a slow $300 Windows netbook with limited SSD storage or a a slow $300 budget Windows laptop with a large but very slow mechanical hard drive.
  • mbhatia - Saturday, October 17, 2015 - link

    Can someone please assist me advising how I can lock an OFFLINE folder/file etc in a Chromebook...on an attached SD card etc. One needs to remain stuck in there because of the low internal memory and I while the Cloud portion of the chromebook is secure, anyone can take out the SD card and access the contents of an unsecured folder. There are apps for this Android and Windows and making a secure drive etc in Mac... how do I achieve something so basic in a Chromebook? This is the only piece of the puzzle missing for me in adopting this full time and loading it up with my data. Reply
  • Insomniator - Wednesday, February 11, 2015 - link

    Even at only $300 it bothers me to see you'd have to be concerned with video settings when playing something as basic as a Youtube video. I feel like that should not be an issue in 2015, even given the budget/basic segment this device is targeted for.

    The GPU should most definitely at least be able to play video at the displays intended resolution and refresh rate... its not like that is so hard when it is already mentioned that the previous chip is 2-3x faster. Just seems like a very odd and poor choice by Toshiba here.
  • dli7319 - Monday, February 16, 2015 - link

    Part of the problem is that the html5 player is not wall optimized. On my FHD Toshiba CB2, I can play 1080p60 Youtube videos using their flash player and even 4k videos recorded from my OnePlus One locally but Youtube's default html5 player will stutter and lag all over 1080p60 or 3840p30 videos. Reply
  • damianrobertjones - Wednesday, February 11, 2015 - link

    Jimmy, who's recently pushed aside his core 2 duo laptop with its 480GB hard drive, returns home after using his Nokia 1020 for recording video. He plugs in the phone, that has the best phone cam you can buy (He likes shiny things), then drags across the video (I hope the Chromebook can access the device otherwise he's back to his Core 2 duo).

    A few seconds in and the device is full.

    Chromebooks = Pointless. They're only really suitable for people that MUST have the latest techie fad that others are talking about. Sure, yeah, ok, they're actually not THAT bad but lets not pretend here... 16GB storage is pathetic for a laptop based device. If this were windows it would be laughed out of the page even with 32GB of storage.
  • iMPose - Wednesday, February 11, 2015 - link

    If Jimmy A) likes shiny (expensive) things, and B) bought the 1020 because it has the best camera you can get on a phone, and C) needs a computer on which to store/manipulate large video files, then he is not the target customer, and I suspect he already knows this.

    And that's OK. Chromebooks aren't for everyone. Don't discount a product simply because it doesn't fit your needs. Some people don't need more than a cheap, speedy laptop for web browsing, etc.

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