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50 microseconds – cycle time for highest human-audible tone (20 kHz). 50 microseconds – to read the access latency for a modern solid state drive which holds non-volatile computer data. [5] 100 microseconds (0.1 ms) – cycle time for frequency 10 kHz. 125 microseconds – common sampling interval for telephone audio (8000 samples/s). [6]
The IBM 7030 Stretch performs one floating-point multiply every 2.4 microseconds. [78] Second-generation (transistor-based) computer. 1984 $18,750,000 $54,988,789 Cray X-MP/48 $15,000,000 / 0.8 GFLOPS. Third-generation (integrated circuit-based) computer. 1997 $30,000 $56,940 Two 16-processor Beowulf clusters with Pentium Pro microprocessors [79]
Metric time is the measure of time intervals using the metric system.The modern SI system defines the second as the base unit of time, and forms multiples and submultiples with metric prefixes such as kiloseconds and milliseconds.
A unit of 10 milliseconds may be called a centisecond, and one of 100 milliseconds a decisecond, but these names are rarely used. [3] To help compare orders of magnitude of different times, this page lists times between 10 −3 seconds and 10 0 seconds (1 millisecond and one second). See also times of other orders of magnitude.
The software was designed with a kludge to handle a database request that should "never" time out. Rather than specifically handling this special case, the initial design simply specified an arbitrary time-out date in the future with a default configuration specifying that requests should time out after a maximum of one billion seconds.
Software timekeeping systems vary widely in the resolution of time measurement; some systems may use time units as large as a day, while others may use nanoseconds.For example, for an epoch date of midnight UTC (00:00) on 1 January 1900, and a time unit of a second, the time of the midnight (24:00) between 1 January 1900 and 2 January 1900 is represented by the number 86400, the number of ...
Closely related to system time is process time, which is a count of the total CPU time consumed by an executing process.It may be split into user and system CPU time, representing the time spent executing user code and system kernel code, respectively.
Excel offers many user interface tweaks over the earliest electronic spreadsheets; however, the essence remains the same as in the original spreadsheet software, VisiCalc: the program displays cells organized in rows and columns, and each cell may contain data or a formula, with relative or absolute references to other cells.