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Research Shows RISC vs. CISC Doesn't Matter

petermgreen Re:It's a question that WAS relevant (155 comments)

The downside of having few registers in the ISA is it means the compiler may have to choose instruction ordering based on register availability or worse still "spill" registers to memory to fit the code to the available registers.


Ask Slashdot: What To Do About Repeated Internet Overbilling?

petermgreen Re:AT&T DSL/Uverse Data Limits (349 comments)

x3 for the encoding

The only way you'd get that kind of expansion is using quoted-printable in a case where it's totally inappropriate. If your mail client is doing that you really need to file a bug.

2 days ago

Ask Slashdot: What To Do About Repeated Internet Overbilling?

petermgreen Re:AT&T Billing (349 comments)

He didn't say what those ISPs were buying from AT&T you assumed it was bandwidth to "the internet", I think it's more likely that what they were buying was bandwidth to "the end user".

Sure theres lots of competition if what you want is transit bandwidth from a major datacenter in a major city to the internet. Not so much if what you want is bandwith from that same major datacenter to your customer out in the burbs.

2 days ago

Ask Slashdot: What To Do About Repeated Internet Overbilling?

petermgreen Re: What are you downloading? (349 comments)

Finally some insight. 150GB is trivial for a "modern" family, and would easily be dwarfed if comcast billed their "cable" as "data."

Cable is for the most part a broadcast system though.

The real problem is that we need internet access provided and regulated as a utility. No, i don't much relish the thought of paying per-(prefix)byte, but I'd rather have an enforced system where everyone pays a rate that reflects what the service actually costs than the current hideously broken regime.

You'd have to be pretty careful how the system was set up through. In particular the definition of "what the service actually costs"

The real cost in providing internet access is replacing infrastructure. When you build new infrastructure you (if you have any sense) build it with ample bandwidth but gradually the bandwidth becomes less and less ample. Most people still get their internet through infrastructure that was really designed for phone calls or broadcast TV and has had patchwork upgrades.

The people at the telcos/cablecos look at the cost of the forklift upgrades to handle the growing traffic and get sticker shock. Then they look at the usage patterns and find that households like your ""modern" family" are the exception not the rule (and I fully admit that i'm probablly part of said exception). Then they put in place measures so that those households either reduce their usage or pay more.

I fear with a "cost based" model the utilities would be prone to keep running old (and expensive per-(prefix)byte) infrastructure to an even greater extent than they do today. Why install more modern (and cheaper per-(prefix)byte) infrastructure when it just means you get to charge less for the same data.

2 days ago

Ask Slashdot: What To Do About Repeated Internet Overbilling?

petermgreen Re: maybe (349 comments)

On the other hand postal services and couriours can and do charge you for the complete weight of your package including packaging and they will almost certainly refuse to ship your package if you don't package it to something at least approximating their standards.

2 days ago

California Passes Law Mandating Smartphone Kill Switch

petermgreen Re:Simplier solution at the carrier level (233 comments)

and everyone else

That's the hard bit. If you block the phone from all networks in your home country the theives will just export it. Theives have also found ways to change the identity of at least some models of phone.

Good luck getting the whole world to block your stolen phones.

3 days ago

How many devices are connected to your home Wi-Fi?

petermgreen Re:and how many devices on next door's wifi? (259 comments)

Probablly a lot less than there used to be.

Afaict pracitally all new home routers are now locked down with WPA by default and have been for several years. Also providers at least round here seem to give you a new router when you take up their services or switch to a faster package that requires new equipment. There will still undoutablly be some old routers out there from people who have not changed ISP, not changed to a faster package requiring new equipment and not had their router simply die on them in years but the number will be dwindling.

4 days ago

Latest Wikipedia Uproar Over 'Superprotection'

petermgreen Re:say it again (239 comments)

The problem is to those not skilled in the art (whatever the "art" in question is) it's very hard to tell the reputable sources from the BS. Furtheremore the sources that are most likely to be reputable are often locked up behind paywalls.

Wikipedia ends up with a set of rules that heavilly favour the mainstream media. Unfortunately the mainstream media is poor on the fact checking and heavilly biased towards certain subject areas.

about a week ago

Latest Wikipedia Uproar Over 'Superprotection'

petermgreen Re:WikiWand (239 comments)

You also have multiple competing power structures none of which seem very democratic to me.

You have the "community driven" processes on the individual wikis which afaict are largely driven by who is prepared to put the most time into them and who is already a wiki admin or at least has friends among them.

Then you have the wikimedia foundation which is led by a board of trustees. There is some voting involved but less than half the board is directly elected. Below them you have various staff which are even further removed from community input.

about a week ago

Latest Wikipedia Uproar Over 'Superprotection'

petermgreen Re:WTF? Can someone summarize? (239 comments)

It used to be that you clicked on an image and were taken to the image description page with lots of information about the image, access to full resoloution versions etc.

Now when you click on an image some javascript media viewer pops up with very little information on the image, if the javascript is working correctly then this adds an extra click to the route to the image description page. The first time you see this it's not entirely obvious how to get to the image description page. I'm sure i've also seen cases where the javascript didn't work properly.

The local admins on some high profile wikipedia projects tried to disable this media viewer. So the wikimedia foundation added a new feature ("superprotection") to the software to take control of whether the media viewer was enabled (and many other things) away from the local admins.

about a week ago

Google's Driverless Cars Capable of Exceeding Speed Limit

petermgreen Re:Safety vs Law (475 comments)

Also, you should know that a 89/90 impact is 2.01 times as hard as a 44/45 impact. Twice the speed is four times the kinetic energy.

Assuming the two cars are moving in the same direction the impact itself and the energy it dissapates is the same.

For example lets take the simple case, e.g. assume the collision is inelastic and the vehicles weigh 1 unit of mass each each.

kenetic energy before impact 89^2 +90^2 = 16021
kenetic energy after impact 89.5^2 + 89.5^2 = 16020.5
difference in kenetic energy = 0.5

kenetic energy before impact 44^2 + 45^2 = 3961
kenetic energy after impact 44.5^2 + 44.5^2 = 3960.5
difference in kenetic energy 0.5

Slight differences in direction will cause an increase in energy dissipated at higher speeds because the relative velocity will be slightly higher but it won't be "twice as hard".

about a week ago

Email Is Not Going Anywhere

petermgreen Re:anti-spam sites force centralization, help SIGI (235 comments)

Now, unless you arrange for your outbound email to arrive from a server operated by a large email provider, your deliverability is probably low.

You have to make sure your mail is delivered from something that looks like a server (e.g. not on lists of known dynamic IP blocks, has proper reverse dns) but you don't have to use a "large email provider".

Been running my own email for years with few problems.

about two weeks ago

Email Is Not Going Anywhere

petermgreen Re:Ubiquitous Common Denominator (235 comments)

No, SMS is the common denominator. Not every phone has email, but they all have SMS. (Change of perspective, the computer is no longer the preferred medium of communication.)

In office jobs the chances are everyone will have a work computer which they spend a large portion of the time sitting in front of but only a subset will have a work mobile* and most people probablly aren't going to want to give their personal mobile number out to all their collegues

And while a phone has the advantage of portability there is no way that it's a preferable device to a computer for viewing and entering large numbers of messages

And then there are the techical limitations, a sms is only 160 characters. Yes modern phones can chain messages but that drives up the cost and can only carry plain text.

For people who don't work in an office it is of course a different matter.

* Yes I know some landline phones support SMS but afaict it's the exception not the rule.

about two weeks ago

Microsoft Surface Drowning?

petermgreen Re:It *would* be if they unlocked the bootloader (337 comments)

The arm based (non-pro) surface models have a permanently locked bootloader. The x86 based (pro) surface models have a regular secure boot setup (locked by default but can be unlocked by the user).

about three weeks ago

Google Will Give a Search Edge To Websites That Use Encryption

petermgreen Re: Great step! (148 comments)

To clarify I fully understand why startSSL do this, they are a buisness and they need to make money and they are certainly the best value widely recognised CA I have found.

I just don't think using startSSLs limited free certs as a rebuttal to claims that SSL increases costs for website operators is reasonable. Either you pay to get the wildcard certs or you pay to get extra IPv4 addresses or some combination of the two.

about three weeks ago

Oracle Hasn't Killed Java -- But There's Still Time

petermgreen Re:hmm (371 comments)

What gets me about java is that they add fancy new stuff like lambdas while leaving out basics like properties, operator overloading and user defined value types.

about three weeks ago

Yahoo To Add PGP Encryption For Email

petermgreen Re:It's a TRAP! (175 comments)

The problem is not so much sending encrypted mail. The problem is sending signed mail or receiving encrypted mail. In those cases you need to provide your private key to the mail software.

If the mail software is running on a third party server then that means handing your private key over to them. If the mail software is javascript in a browser then the javascript could be written to keep the private key in the browser but there is a significant risk of the javascript being quietly substituted.

about three weeks ago

Yahoo To Add PGP Encryption For Email

petermgreen Re: It's a TRAP! (175 comments)

You know what ADK is? A back door. So, either they're encrypting it twice (once with your key, once with the other), or they've poked holes in the encryption and it is complete garbage.

The usual way to do multi-recpiant encryptions is you encyrpt the message with a freshly generated symmetric session key. Then you encrypt the sesssion key multiple times with the recipiants public keys.

but it assumes you have 100% explicit trust in the agent who has the ADK

Indeed it does, in security there is always a balance between keeping prying eyes out and keeping records available to those with legitimate reason to access them.

about three weeks ago

Yahoo To Add PGP Encryption For Email

petermgreen Re:It's a TRAP! (175 comments)

It didn't but yahoo is a webmail provider and webmail kinda implies that the provider will either be storing the key or at the very least be able to access it by tweaking some javascript a litte.

The reason PGP is difficult for the plebs is that secure encryption requires you to take responsibility for your own key management and ensure to the best of your ability that the key does not leave devices you control (if you are really paranoid you don't even put it on an internet connected machine). If you leave key management up to a third party then your whole security becomes dependent on them.

about three weeks ago

AMD Prepares To Ship Gaming SSDs

petermgreen Re:harddrive speed (110 comments)

What games did they test? I've certainly seen games where a SSD made a BIG difference to loading times (roller coaster tycoon 3 springs to mind)

If the game just wants to load a big block of predetermined data from a sequential set of locations in a data file then HDD is fine, the problem comes when due to either lack of optimisation or the open/flexible nature of the game it needs to load lots of small peices in a non-sequential manner than a SSD makes a big difference.

about three weeks ago


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