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+.\" Copyright (c) 1979 The Regents of the University of California.
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	@(#)pxin4.n	5.2 (Berkeley) 4/17/91
+.\"
+.if !\n(xx .so tmac.p
+.nr H1 3
+.if n .ND
+.NH
+Conclusions
+.PP
+It is appropriate to consider,
+given the amount of time invested in rewriting the interpreter,
+whether the time was well spent, or whether a code-generator
+could have been written with an equivalent amount of effort.
+The Berkeley Pascal system is being modified to interface
+to the code generator of the portable C compiler with
+not much more work than was involved in rewritting
+.I px .
+However this compiler will probably not supercede the interpreter
+in an instructional environment as the
+necessary loading and assembly processes will slow the
+compilation process to a noticeable degree.
+This effect will be further exaggerated because
+student users spend more time in compilation than in execution.
+Measurements over the course of a quarter at Berkeley with a mixture
+of students from beginning programming to upper division compiler
+construction show that the amount of time in compilation exceeds the amount
+of time spent in the interpreter, the ratio being approximately 60/40.
+.PP
+A more promising approach might have been a throw-away code generator
+such as was done for the
+.SM
+WATFIV
+.NL
+system.
+However the addition of high-quality post-mortem and interactive
+debugging facilities become much more difficult to provide than
+in the interpreter environment.