11-21-2009
Quote:
Originally Posted by
ghostdog74
a second or two doesn't make a difference. Nobody cares, (maybe except you). If it's more than 30 minutes maybe it will make a difference.
That's not the case.
The basic advice regarding response times has been about the same for thirty years [Miller 1968; Card et al. 1991]:
* 0.1 second is about the limit for having the user feel that the system is reacting instantaneously, meaning that no special feedback is necessary except to display the result.
* 1.0 second is about the limit for the user's flow of thought to stay uninterrupted, even though the user will notice the delay. Normally, no special feedback is necessary during delays of more than 0.1 but less than 1.0 second, but the user does lose the feeling of operating directly on the data.
* 10 seconds is about the limit for keeping the user's attention focused on the dialogue. For longer delays, users will want to perform other tasks while waiting for the computer to finish, so they should be given feedback indicating when the computer expects to be done. Feedback during the delay is especially important if the response time is likely to be highly variable, since users will then not know what to expect.
Response Time Overview
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LEARN ABOUT HPUX
hppaccvda
hppac(3X) hppac(3X)
NAME
hppac: HPPACADDD(), HPPACCMPD(), HPPACCVAD(), HPPACCVBD(), HPPACCVDA(), HPPACCVDB(), HPPACDIVD(), HPPACLONGDIVD(), HPPACMPYD(), HPPAC-
NSLD(), HPPACSLD(), HPPACSRD(), HPPACSUBD() - HP 3000-mode packed-decimal library
SYNOPSIS
DESCRIPTION
This set of calls invokes the library functions for emulating 3000-mode (MPE V/E) packed-decimal operations. These functions are in
library which is searched when the option is used with or ld(1).
Performs packed-decimal addition.
Compares two packed-decimal numbers.
Converts an ASCII representation to packed-decimal.
Converts a binary representation to packed-decimal.
Converts a packed-decimal number to ASCII.
Converts a packed-decimal number to binary.
Performs packed-decimal division.
Performs packed-decimal division (alternate routine).
Performs packed-decimal multiplication.
Performs a packed-decimal normalizing left shift.
Performs a packed-decimal left shift.
Performs a packed-decimal right shift.
Performs packed-decimal subtraction.
For all operations, the value returned in the variable to which the compcode argument points is one of the following values of type
Result > 0 or operand1 > operand2
Result < 0 or operand1 < operand2
Result == 0 or operand1 == operand2
For all operations, the value returned in the variable to which the pacstatus argument points is one of the following values of type Their
meanings are intended to be obvious:
AUTHOR
The HPPAC library was developed by HP.
SEE ALSO
PA-RISC Systems Only hppac(3X)