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(A process is a running program.) Upon starting a process, the operating system records the time using an internal timer. When the process is suspended or terminated, the operating system again records the time. The total time that a process spent running is its CPU time, as shown in the figure.
Rewriting sections "pays off" in these circumstances because of a general "rule of thumb" known as the 90/10 law, which states that 90% of the time is spent in 10% of the code, and only 10% of the time in the remaining 90% of the code. So, putting intellectual effort into optimizing just a small part of the program can have a huge effect on the ...
Memory latency is the time (the latency) between initiating a request for a byte or word in memory until it is retrieved by a processor. If the data are not in the processor's cache, it takes longer to obtain them, as the processor will have to communicate with the external memory cells. Latency is therefore a fundamental measure of the speed ...
True photographic memory (the ability to remember endless images, particularly pages or numbers, with such a high degree of precision that the image mimics a photo) has never been demonstrated to exist in any individual, [463] although a small number of young children have eidetic memory, where they can recall an object with high precision for ...
Image credits: Pamela Koehler The Holiday Blues are a very real and "unmerry" thing. One 2023 survey found that almost 90% of American adults feel stressed during the holiday season. 41% said they ...
An example is a computer program that processes files. A part of that program may scan the directory of the disk and create a list of files internally in memory. After that, another part of the program passes each file to a separate thread for processing. The part that scans the directory and creates the file list cannot be sped up on a ...
“It was a record company that had a really cool bad attitude,” Avery said. “Like, they wound up putting out records like Flipper’s record, which would forever endear them to my heart.
Dr. Robert Newman, a longtime advocate for the use of methadone to treat heroin addiction, was quoted in the Times article as saying that buprenorphine “is associated with a large number of deaths.” Reached by HuffPost, he said the Times story was harmful to those in the recovery community. “I am not an expert in buprenorphine,” he said.