Browser Face-Off: Battery Life Explored
by Jarred Walton on September 11, 2009 6:00 PM EST- Posted in
- Laptops
Netbook Browser Battery Life
The first two laptops are representative of a large portion of the mobile market. Both processors are reasonably fast, you get 4GB RAM, and battery life is acceptable if not great. Discrete graphics would improve performance in gaming applications by a substantial amount, but it would also eat into the battery life, which is why most laptops utilize integrated graphics. Our last laptop for the browser battery life testing represents the last major chunk of the mobile market where battery life would matter: netbooks. The ASUS 1005HA represents the current state-of-the-art in netbooks, with an Intel Atom N280 processor, 1GB memory, a 160GB hard drive, and a 10.1" LCD. It uses the Intel 945GSE + ICH7MU chipset with integrated GMA 950 graphics.
Unlike our testing for the 1005HA review, we set the Super Hybrid Engine to "High" instead of "Auto", so the N280 won't underclock on battery. This reduces battery life by around 6%. Since the 1005HA runs XP instead of Vista, we also chose the "Portable/Laptop" power profile rather than the "Max Battery"; the reason is that the netbooks tend to run too slow when set to "Max Battery" and the gains aren't as substantial as with faster laptops. We measured a 7.5% increase in battery life by switching to the "Max Battery" profile, if you're interested.
| ASUS Eee PC 1005HA Specifications | |
| Processor | Intel Atom N270 or N280 (Tested) N280: 1.66GHz, 512KB L2, 45nm, 667FSB |
| Chipset | Intel 945GSE + ICH7MU |
| Memory | 1x1024MB DDR2-533 @ 4-4-4-12 Timings |
| Graphics | Integrated Intel GMA 950 |
| Display | 10.1" Glossy LED-Backlit ~16:9 WSVGA (1024x600) |
| Hard Drive | 2.5" 160GB 5400RPM 7MB (Hitachi HTS543216L9SA00) |
| Networking | Atheros AR8132 Fast Ethernet Atheros AR9285 802.11n WiFi |
| Audio | Realtek AL269 2-Channel HD Audio (2.0 Speakers with headphone/microphone jacks) |
| Battery | 6-Cell 11.25V, 5600 mAhr, 63.0 Whr |
| Front Side | None |
| Left Side | Heat Exhaust Kensington Lock 1 x USB 2.0 VGA AC Power Connection |
| Right Side | SD/MMC reader Microphone/Headphone Jacks 2 x USB 2.0 100Mb Fast Ethernet |
| Back Side | None |
| Operating System | Windows XP Home SP3 |
| Dimensions | 10.31" x 7.01" x 1.02"-1.44" (WxDxH) |
| Weight | 2.8 lbs (with 6-cell battery) |
| Extras | 1.3MP Webcam Super Hybrid Engine (software over/under clocking) Available in White, Black, Blue, and Pink |
| Warranty | 1-year standard ASUS warranty (USA) Extended warranties available |
| Price | Black 1005HA-PU1X-BK starting at $381 |
Unlike the other laptops, all of the browsers offer almost the same battery life on the 1005HA. Google Chrome comes in first this time, offering 2.5% more battery life than IE8. There's only a four minute gap between IE8 and Opera 10, a difference of less than 1% total. AdBlock doesn't help Firefox this time, most likely because of the amount of processing it takes to parse HTML and perform regular expression matching.
The gap between first and sixth with a netbook looks to be 3.5%, so if you're using a netbook you can select a browser based on other features, though Chrome does come in first by almost 15 minutes. The major exception is that Apple's Safari 4 web browser again comes in last, again by a large margin. Chrome managed 36% more battery life on the 1005HA than Safari, and Flash content within Safari 4 used a significant amount of CPU time. Safari seems to want more CPU power than the Atom can provide, with the result being the processor is often near 100% utilization for significant amounts of time on Flash-heavy sites.
Facebook
Twitter
RSS
76 Comments
View All Comments
JarredWalton - Monday, September 14, 2009 - link
The test is set to load the three test pages every minute -- it's constant "user speed" simulation rather than maximum web page rendering rate. So in this instance, if two browsers ran for four hours, they rendered the same number of pages in that time.If I wanted to test page views per Watt, I'd need to come up with a different test, and the results wouldn't be a realistic demonstration of how people use web browsers. You have to pause and read a page to know what's there; if you're just constantly reloading pages, you can make a battery life stress test but it is no longer anything approaching a realistic view of browser usage. IMO anyway.
erple2 - Monday, September 14, 2009 - link
I suppose the only corollary to that is that the test assumes that every page takes (far) less than 1 minute to load. Otherwise the GP might have a point.If it takes longer than 1 minute to reach "steady state", then it might become more of an issue as to which browser is more productive.
Perhaps to "truly" measure this, you would have the timer start at 1 minute after steady state is achieved, then count how many 1 minute steady state events exist. That would make for an oddly discrete number of trials, however. However, that might only really measure how much power each browser draws while rendering a page as a function of the total amount of time spent on a "trial". However, in keeping with the other benchmarks you've provided, it appears that the time of rendering is somewhat irrelevant.
Whew! Glad I don't have to design and run meaningful benchmarks! That's hard!
postler - Sunday, September 13, 2009 - link
It would be interesting to compare Opera using all of its features (bit torrent client, chat, email client) vs other browsers with seperate programs for these tasks. I suppose Opera is more power efficient compared to other browsers+email client+bittorrent client running.JarredWalton - Monday, September 14, 2009 - link
I don't think the majority of people are going to run a bittorrent client on battery power. However, this is not a review of browsers in general; it's just a look at battery life using the same surfing test on each one. Personally, I'm a Firefox guy and this isn't enough to convince me to look elsewhere.yourwhiteshadow - Sunday, September 13, 2009 - link
What about battery life on the new macbook pros w/various browsers? Also, I went to test out a 13.3" MBP at the apple store, and ran peacekeepeer on it. The $1499 version with 4 gb ram, 2.53 ghz proc, and 250 gb hdd got consistently got a lower score than the $1199 version which had 2 gb ram, 2.26 ghz proc, and 160 gb hard drive. Both ran the same video chipset. Any ideas as to what is going on? I ended up buying the $1199 one obviously, but still I'm a little curious.Voo - Sunday, September 13, 2009 - link
I'm astonished everytime I read a article with several pages of big colorfull benchmarks in it and then see people asking for evidence to backup the "claims" made at the end of the article..Interesting article, though I knew before reading it that I wouldn't replace my FF. I'm just too customized to it - yep I know I'm ignorant, but after all the differences between the browsers are relativly small so I think I'll survive it ;)
But yes just out of courtesy I'd be interested in the same benchmarks run under OS X. Would be interesting to see how IE would fare there (I think Raymond Chen said once that the IE is more or less a GUI wrapped around several core dlls, which shouldn't work for OSX)
coachingjoy - Sunday, September 13, 2009 - link
Well done.Appears IE8 is good for something.
araczynski - Saturday, September 12, 2009 - link
that was refreshingly, um, refreshing, and quite surprising, didn't think there'd be that much noticeable difference between the browsers in terms of battery life of all things.still hate that each of them has their own stupid rendering quirks that they seem to believe themselves above eliminating.
IntelUser2000 - Saturday, September 12, 2009 - link
"None of these laptops would qualify as high-end solutions, mostly because we don't think users interested in battery life are going to be looking at high-end laptops."That quote and this:
"Please note that unlike our normal battery life tests, we set the laptop on the Vista "Power Saver" profile instead of "Balanced", with the hard drive set to power down after 3 minutes and the maximum CPU performance set at 50%."
This is ridiculous. One of the most stupid and contradictory reviews ever seen on Anandtech. Sorry but please benchmark settings that people will use. Nobody is going to put "Power Saver" on a Core 2/Turion Notebook and enable "High" on a Atom Netbook. What's the point here? I mean you said the battery life difference was 6% for Power Saver vs. Balanced which isn't significant at all for performance sacrifice. Does it artificially inflate the score differences between browers? Have you tested to see if the positions change with different settings?
Again, what's the point of this review? Normally I'm very positive to Anandtech. This article isn't one that would show that. You could have at least put both results.
JarredWalton - Saturday, September 12, 2009 - link
I'm not sure what your beef with the first quote is supposed to be. Do you think people buying high-end laptops with discrete graphics care about battery life? I don't. If you have a Core 2 Quad laptop and GTX 260M graphics, your battery life will stink regardless of browser, so I decided to look at several laptops that offer reasonable battery life and see if the choice of browser mattered. Moving on....The "High" setting on the ASUS was not for the OS. That was set on "Portable/Laptop". The "High" setting is specifically for ASUS' Super Hybrid Engine, which underclocks the CPU and FSB if you leave it on "Auto". The CPU can still use SpeedStep, but it will stay on a 166MHz bus (667FSB) instead of SHE dropping it to 147MHz (588FSB). Mostly I did it to reduce the amount of time required to run the tests; at over seven hours per browser, running each twice, it already took more than a week of testing time. I don't have the 1005HA anymore (ASUS wanted it back), so I can't retest anything on it.
As I also mentioned, using "Balanced" instead of "Power Saver" gives you an extra 6% battery life - since that's what we're looking at for using different browsers, I figured it was a useful bonus. Also, I was running some of those tests for use in a future article, so I didn't want to repeat testing any more than necessary. Regardless, using Power Saver is hardly "ridiculous", and the comparison wasn't between AMD and Intel and Atom. That's why those results are on separate pages.
If you want apples-to-apples on browsers on each laptop, that's what I provided here. If you want to compare identical settings between different laptops, that's what I've always done in the standard notebook/netbook reviews. As far as I can tell, the power saving setting does not influence the individual browser results, though to be sure I would need to run every single test again with different settings. That's not something I really feel is necessary.
And FWIW, the "50%" setting in the advanced power options doesn't mean the CPU runs at half the maximum clock speed. CPUZ tells me otherwise. I've seen some laptops set that to "20%" or even "0%", and yet the systems still run. All I know for sure is that I used the same power settings on both Gateway systems. Since the 1005HA runs XP instead of Vista, there's already an inherent difference. I'll be looking at XP, Vista, and Win7 shortly, though, so stay tuned.