#nanoseconds

[silveragelovechild]

So I’ve been thinking… with all those wires that hold the panels in place, the costume must be incredibly difficult to put on… without help.

But I suppose that a speedster can afford the extra nano-seconds he’d need.

[dat-physics-gal]

do you have a favourite physics fun fact?

I like how a light-nanosecond is pretty close to one american ft. Not that i use feet, but i could be persuaded if they were redefined to exactly one light-nanosecond.

[xrpvibe]

XRP To This In Nanoseconds? & SEC Should Withdraw Ripple Lawsuit

XRP To This In Nanoseconds? & SEC Should Withdraw Ripple Lawsuit

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[folioninja]

June 15: Eight of Wands #milliseconds #microseconds #nanoseconds #picoseconds #femtoseconds https://www.instagram.com/p/CBhPXCqHiMB/?igshid=1lsctvgkhzq69

[monohedron]

[newstfionline]

Time Split to the Nanosecond Is Precisely What Wall Street Wants

By John Markoff, NY Times, June 29, 2018

SAN FRANCISCO--Computer scientists at Stanford University and Google have created technology that can track time down to 100 billionths of a second. It could be just what Wall Street is looking for.

System engineers at Nasdaq, the New York-based stock exchange, recently began testing an algorithm and software that they hope can synchronize a giant network of computers with that nanosecond precision.

For an exchange like Nasdaq, such refinement is essential to accurately order the millions of stock trades that are placed on their computer systems every second.

Ultimately, this is about money. With stock trading now dominated by computers that make buying and selling decisions and execute them with blazing speed, keeping that order also means protecting profits. So-called high frequency trading firms place trades in a fraction of a second, sometimes in a bet that they can move faster than bigger competitors.

The pressure to manage these high-speed trades grows when the stock market becomes more volatile, as it has been in recent months, in part to prevent the fastest traders from taking unfair advantage of slower firms. High frequency traders typically account for more than half of daily stock trading volume in the United States, according to data from the Tabb Group.

“The financial industry has easily become the most obsessed with time,” said Balaji Prabhakar, a Stanford University electrical engineer who is one of the designers of the new synchronization system.

Because the orders are placed from locations around the world, they frequently arrive at the exchange’s computers out of sequence. The new system allows each computer to time stamp an order when it takes place. As a result, the trades can be sorted and executed in correct sequence.

The importance of technical advances in measuring time was underscored by European regulations that went into effect in January and that require financial institutions to synchronize time-stamped trades with microsecond accuracy.

Being able to trade at the nanosecond level is vital to Nasdaq. Two years ago, it debuted the Nasdaq Financial Framework, a software system that it has envisioned eventually trading everything from stocks and bonds to fish and car-sharing rides.

To go from trading equities to managing all sorts of financial transactions will require more than an order of magnitude speedup in the company’s networks of computers. It will be possible only if all of the exchange’s computers agree on time with nanosecond accuracy.

A generation ago, computing usually took place in a single mainframe or personal computer. Now it is routinely spread across thousands of independent processors in machines that can be separated by a few feet or entire continents.

Chip designers have long struggled to maintain the precise timing needed to order mathematical operations inside individual computing chips. And synchronizing these vast ensembles of them has become the limiting factor in the speed and processing power of what Google describes as “planetary-scale” computers.

“It’s kind of mind-boggling,” said Peter Hochschild, a Google software engineer who specializes in the challenges associated with spreading software and data across networked computers. “Inside a processor, an enormous amount of stuff happens in a billionth of a second.”

A billionth of a second is roughly the time it takes light to travel one foot. It has long been viewed as a crucial measure in computing. In the 1960s, the computing pioneer Grace Murray Hopper would hand out 11.8-inch lengths of wire to illustrate how designing smaller electronic parts would create faster computers.

Distance has become even more significant as software has begun to escape the boundaries of individual computers and make its way into the cloud--the web of giant computer data centers that have come to blanket the planet.

They are near dams to take advantage of cheap hydroelectric power and in cold climates to save on cooling costs. Microsoft has even begun submerging them in the ocean to take advantage of power generated by tidal surges.

Because software and data are no longer in the same place, correctly calculating the order of the events that may be separated by feet or miles has become the dominant factor in the speed with which data can be processed.

[andrewgalbraith]

Grace Hopper explains Nanoseconds.

[totheescapement]

Take an arbitrarily short duration -- I'll speak of 'nanoseconds' for familiarity and convenience, but you could use an even smaller measure of time.  Could removing a mere (arbitrary) nanosecond from your life plausibly make your life any worse on the whole?  You might think not, on the basis that "surely nothing of any significance could occur during such a short time."  On the other hand, if you remove all the nanoseconds then we have no life left at all, which is certainly a significant difference.  Is it coherent to think that many individually worthless moments might collectively have value?

Richard Chappell