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Groups > comp.compilers > #3101
| From | Kaz Kylheku <480-992-1380@kylheku.com> |
|---|---|
| Newsgroups | comp.compilers |
| Subject | Re: Why don't compiler writers adhere to the dragon book recommendation of one lexer rule for keywords and identifiers? |
| Date | 2022-06-26 06:17 +0000 |
| Organization | A noiseless patient Spider |
| Message-ID | <22-06-082@comp.compilers> (permalink) |
| References | <22-06-075@comp.compilers> <22-06-079@comp.compilers> |
On 2022-06-25, gah4 <gah4@u.washington.edu> wrote: > Some years ago, the Hercules group was trying to get gcc running > on an emulated IBM S/370 running MVS, with an 8M region. > (Out of the 16M byte address space, MVS takes up about half.) > But you can't run gcc in 8M bytes. > > When I remember S/370 and OS/VS2, the usual region was 300K, > which we thought was big. > > And now, we can barely run a system with 4G main memory, > such as the Macbook Air that I am writing this on. My TXR Lisp hits a peak memory footprint of around 17 megabytes during the build of its compiler and standard library (on a 32 bit GNU/Linux system). If the CONFIG_SMALL_MEM build time option is used, it can get down to 11. That's a total footprint including all the code and data areas, such as mappings for the C library (which is a pig nowadays), as reported by common tools like top. (CONFIG_SMALL_MEM just adjusts the sizes of some static arrays used by the garbage collector and sets certain thresholds differently.) -- TXR Programming Language: http://nongnu.org/txr Cygnal: Cygwin Native Application Library: http://kylheku.com/cygnal [I think we should stop here before I start telling you what we did on a 4K PDP-8. -John]
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Why don't compiler writers adhere to the dragon book recommendation of one lexer rule for keywords and identifiers? Roger L Costello <costello@mitre.org> - 2022-06-25 12:58 +0000
Re: Why don't compiler writers adhere to the dragon book recommendation of one lexer rule for keywords and identifiers? gah4 <gah4@u.washington.edu> - 2022-06-25 13:01 -0700
Re: Why don't compiler writers adhere to the dragon book recommendation of one lexer rule for keywords and identifiers? Kaz Kylheku <480-992-1380@kylheku.com> - 2022-06-26 06:17 +0000
Re: Why don't compiler writers adhere to the dragon book recommendation of one lexer rule for keywords and identifiers? Hans-Peter Diettrich <DrDiettrich1@netscape.net> - 2022-06-26 10:20 +0200
One lexer rule for keywords and identifiers Christopher F Clark <christopher.f.clark@compiler-resources.com> - 2022-06-26 00:09 +0300
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