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Show fc '* o v" The Pragma-tic Envxr@3puant 1, IntroduotLon In this chaptei we dirst coiisider the isrobiems ot j^tiysiCäily raalizxng the p'-j. lo.'jophies prascjnted In Lhe px'sv.f.ous sections. There have been numeroa:-, iipproachea to solving this -■' problem; some successful, many more vmsiiccassful , Cesis^ter programs in general also seam to work according to the ■ same ratio. One bottleneck 13 the attempt, to "do alJ things for all people"; another is to try to make the program work at 100% efficiency .100% of the Lime,, The first method usually entails huge, unmanageable programs; the second means that much fast hardware will have to be used. The FLEX environment on the object machine takes a drrterent tack. First the machine structure may be designed so that it. is compatible both with the language that will be executed and with the problems that will be solved. Second, a statistica.l viewpoint is adopted, For almost ail computer problems m general, on any machine (and m particular those problems for which the obiect machine is suited) neither 100% efficiency 100% or the time nor blinding speed is necessary, Fortunately from the software point of „lew, the .first is not needed and thankfully, for the price tag, neither is the second, |
