CPU Performance

Our performane comparisons will focus on four current flagship tablets; three from Android and the iPad Air 2.

  Dell Venue 8 7000 Nexus 9 SHIELD Tablet iPad Air 2
SoC Atom Z3580 Tegra K1 Denver Tegra K1 Apple A8X
CPU Cores Quad-core 2.3 GHz Silvermont Dual-core 2.3 GHz Denver Quad-core 2.2 GHz Cortex-A15 Triple-core 1.5 GHz Cyclone
GPU Cores PowerVR G6430 192-core Kepler 192-core Kepler PowerVR GX6850 (8-core)
RAM 2GB LPDDR3 2GB LPDDR3 2GB LPDDR3-1600 2GB LPDDR3
Screen 2560x1600 OLED 8.4-in (359 ppi) 2048x5136 IPS 8.9-in (281 ppi) 1920x1200 IPS 8.0-in (283 ppi) 2048x1536 IPS 9.7-in (264 ppi)
Storage 16GB eMMC
MicroSD Slot (up to 512GB)
16GB eMMC 16GB eMMC
MicroSD Slot
16GB/64GB/128GB
Camera 8MP Rear + Dual 720p Depth
2MP Front
8MP Rear + LED Flash
1.6MP Front
5MP Front
5MP Rear
8MP Front, LED Flash
1.2MP Front
Battery 21 Whr
5900 mAh
25.4 Whr
6700mAh
19.75 Whr
5200 mAh
27.3 Whr
7340 mAh
Network None None None Qualcomm MDM9x25 UE Category 4 LTE
Connectivity 802.11a/b/g/n/ac (2.4/5 GHz)
Bluetooth 4.0
USB 2.0
802.11a/b/g/n/ac (2.4/5 GHz)
Bluetooth 4.1
USB 2.0
NFC
802.11a/b/g/n (2.4/5 GHz)
Bluetooth 4.0
USB 2.0
802.11a/b/g/n/ac (2.4/5 GHz)
Bluetooth 4.0
USB 2.0
 
OS Android 4.4.4 Android 5.0.1 Android 5.0.1 iOS 8.1.3

 

Geekbench 3

Geekbench 3 is Primate Labs' cross-platform processor benchmark, with a new scoring system that separates single-core and multi-core performance, and new workloads that simulate real-world scenarios. Geekbench 3 makes it easier than ever to find out if your computer is up to speed. Every test in Geekbench 3 is multi-core aware. This allows Geekbench to show you the true potential of your system. Whether you're running Geekbench on a dual-core phone or a 32-core server, Geekbench is able to measure the performance of all the cores in your system.

Geekbench acts much like a traditional synthetic processor benchmark would, giving us an idea of the peak performance that the CPU offers in both integer and floating point math.

Our first synthetic benchmark looks at the integer compute performance of the Atom Z3580 and in single threaded results it comes up last in our 5-way comparison behind the Coretex-A15 in the SHIELD Tablet. Multi-threaded performance fares better coming within 17% of the SHIELD Tablet, but actually ahead of the Apple A7 in the iPad Mini Retina.

In single threaded floating point performance the Atom Z3580 is again on the bottom of the list, but the multi-threaded results are actually more impressive than the integer results above. In this case, the Dell Venue 8 7000 scores 3162, higher than the Apple A7 and the Tegra K1 Denver SoCs.

Google Octane

Octane 2.0 is a modern benchmark that measures a JavaScript engine’s performance by running a suite of tests representative of today’s complex and demanding web applications. Octane‘s goal is to measure the performance of JavaScript code found in large, real-world web applications, running on modern mobile and desktop browsers.

The updated Octane 2.0 benchmark includes four new tests to measure new aspects of JavaScript performance, among which: garbage collection / compiler latency and asm.js-style JavaScript performance.

Our testing with Google Octane was done exclusively on the latest version of the Chrome browser on Android, and Safari on iOS.

Great start for the Dell system in our Google Octane browser performance testing, beating out both the iPad Mini Retina as well as the SHIELD Tablet. The Apple iPad Air 2 with the A8X processor is only 15% in our testing.

Mozilla Kraken

Kraken is a JavaScript performance benchmark created by Mozilla that measures the speed of several different test cases extracted from real-world applications and libraries. The test cases include:

  • An implementation of the A* search algorithm
  • Audio processing using Corban Brook's DSP.js library
  • Image filtering routines, including code from Jacob Seidelin's Pixastic library.
  • JSON parsing, including data from Tinderboxpushlog
  • Cryptographic routines from the Stanford JavaScript Crypto Library

Our testing with Mozilla Kraken was done exclusively on the latest version of the Chrome browser on Android and Safari on iOS.

In the Mozilla Kraken results the only platform that the Atom Z3580 is able to outperform is the Apple iPad Mini Retina with the A7 SoC.

SunSpider

This is SunSpider, a JavaScript benchmark. This benchmark tests the core JavaScript language only, not the DOM or other browser APIs. It is designed to compare different versions of the same browser, and different browsers to each other.

This test mostly avoids microbenchmarks, and tries to focus on the kinds of actual problems developers solve with JavaScript today, and the problems they may want to tackle in the future as the language gets faster. This includes tests to generate a tagcloud from JSON input, a 3D raytracer, cryptography tests, code decompression, and many more examples. There are a few microbenchmarkish things, but they mostly represent real performance problems that developers have encountered.

This test is balanced between different areas of the language and different types of code. It's not all math, all string processing, or all timing simple loops. In addition to having tests in many categories, the individual tests were balanced to take similar amounts of time on currently shipping versions of popular browsers.

One of the challenges of benchmarking is knowing how much noise you have in your measurements. This benchmark runs each test multiple times and determines an error range (technically, a 95% confidence interval). In addition, in comparison mode it tells you if you have enough data to determine if the difference is statistically significant.

Our testing with SunSpider was done exclusively on the latest version of the Chrome browser on Android, and Safari on iOS.

Ouch, the SunSpider results are a bit of a letdown for the Dell Venue 8 7000, coming in last with a time of more than a full second. The Apple iPad Air 2 is actually nearly 4x faster in this test. After a talk with Intel about these scores it was pointed out that part of the issue with this test is that the ability for a CPU to boost in Android is governed (slowed) and thus the Intel cores are actually interfered with by the touch of the screen to start the test. I’ll go more into the browsing experience of the Venue 8 7000 in our experiences page later.

Update: I had a couple of people question our result with the Venue 8 7000 and sure enough, a reboot and re-run of the SunSpider benchmark resulted in three scores that averaged out to 625.6ms, much better than the 1175.9ms we had listed here before. With the new score, the Dell Venue 8 7000 is quite a bit faster than the Nexus 9 (which I verified scores on with this update as well) and is only 11% slower than the NVIDIA SHIELD Tablet.

Vellamo 3.1

Vellamo 3.1 is designed to be an accurate, easy-to-use suite of system-level benchmarks for devices based on Android 4.0 forward. In Vellamo we want to enable performance enthusiasts to really understand their system, and how it compares to other systems, and our mission has just begun.

Vellamo began as a mobile web benchmarking tool that today has expanded to include three primary Chapters. The Browser Chapter evaluates mobile web browser performance, the Multicore Chapter measures the synergy of multiple CPU cores, and the Metal Chapter measures the single core CPU subsystem performance of mobile processors.

This test is Android-only, so the Apple iPad Air 2 and iPhone 6 results will be ignored.

Another browser test that shows poor performance results for the Venue 8 7000, this time by a wide margin compared to both of the NVIDIA Tegra K1 powered devices.

The multi-core test is a bit closer for Intel’s Atom Z3580, falling behind the SHIELD Tablet by around 18%.

Single core results in the Metal test of Vellamo again paint the Atom Z3580 into a fairly small performance box.

WebXPRT

WebXPRT 2013 uses scenarios created to mirror the tasks you do every day to compare the performance of almost any Web-enabled device. It contains four HTML5- and JavaScript-based workloads: Photo Effects, Face Detect, Stocks Dashboard, and Offline Notes.

For some reason WebXPRT refused to complete on our SHIELD Tablet running Lollipop so we are left with a total of four results in our data above. The overall performance of the Dell Venue appears to be quite good with a score of 586, just behind the Apple iPad Air 2 with the A8X. However, in both the Photo Effects and Face Detection results, the Atom Z3580 is quite a bit slower than both of the Apple devices. In fact, the Apple A7 is pulling in scores slightly higher than that of the Air 2 with the A8X. In both the stocks dashboard and offline notes the Dell tablet comes in second behind the Denver-based Tegra K1 processor.

TabletMark v3

TabletMark® v3 is the first application based, cross platform benchmark for touch enabled devices. With support for Android, iOS, and Windows, TabletMark gives users an automated, objective and easy-to-use tool to evaluate system performance across a wide range of activities, and across tablet operating systems. TabletMark measures user experience for cross-platform light productivity, media and performance qualified battery life. Real-world tablet usages include Web, Email, Photo, Video Sharing and Video Playback – and a day-in-a-life battery rundown scenario which includes user idle time.

The tool runs a series of activities associated with the scenarios in an automated manner and provides results at the end of the run. No user interaction is needed during the system test.

Our results in the new TabletMark v3 for the Dell Venue 8 7000 fall right between the iPad Mini Retina and the SHIELD Tablet.

In web and email scenarios that are only lightly CPU intense, the Atom Z3580 is able to hold its own in the field coming in ahead of the two iPads but behind both of the Tegra K1 platforms.

Photo and video editing, more multi-threaded and compute intense, the Atom struggles yet again, coming in as the lowest performing SoC.

AndEBench-Pro

Brought to you by the independent industry association, EEMBC (www.eembc.org) – developing industry-standard benchmarks since 1997.

  • Allows device vendors to assess performance, drive competitive analysis, and accomplish stability testing
  • Empowers end-users to validate and compare capabilities of their phones or tablets
  • Compare your benchmark results with other uploaded results at our website - www.eembc.org/andebenchpro.php
  • Automated statistical analysis for minimum, median, and maximum values

Focuses on the key metrics that reflect the most common usage models of Android devices

  • Hardware tests exercise CPU, GPU, memory, and storage
  • Platform tests target common application services including GUI rendering, XML parsing, image operations, cryptography

The overall score for the Dell Venue 8 7000 is 44% slower than the Tegra K1 based SHIELD Tablet though CoreMark has them separated by only 4-5% where direct CPU compute performance is measured. Memory performance seems low as well for a system with a similar LPDDR3 memory interface.

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