Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.compilers > #3123

Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple?

Show all headers | View raw

On Friday, July 15, 2022 at 6:09:05 PM UTC+2, John wrote:
> It's still hard to imagine that the size difference would matter in a
compiler.
> If you're logging a million values a second and saving it to an archive, well,
> that's different. -John

Size matters if the compiler is built around data caches as its core principle
(which means that not only the lexical phase is utilizing caches, but also
means that optimizations are being cached as well). Retrieving cached data
from a storage device (such as: DDR4 DRAM, NVMe SSD) is limited by current
hardware constraints to approximately 10 GB/s in mainstream PCs, while the
speed of computing a SHA-256 hash is limited to approximately 2 GB/s per CPU
core. It is easy to imagine sketches of a compiler based on such a core
principle - it is hard to create a complete "fully fledged" compiler based on
such a core principle.

Btw: Starting a sentence with "It's still hard to imagine that ..." pretty
much ensures that a counter-example will be sent in response.

-atom
[Surely you're aware that the best way to get an answer to a question on
the Internet is to post a wrong answer. -John]

Back to comp.compilers | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? Roger L Costello <costello@mitre.org> - 2022-07-14 10:25 +0000
  Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? gah4 <gah4@u.washington.edu> - 2022-07-14 10:03 -0700
  Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? George Neuner <gneuner2@comcast.net> - 2022-07-14 16:38 -0400
    Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? Spiros Bousbouras <spibou@gmail.com> - 2022-07-15 07:08 +0000
    Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? Jan Ziak <0xe2.0x9a.0x9b@gmail.com> - 2022-07-15 03:02 -0700
      Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? Jan Ziak <0xe2.0x9a.0x9b@gmail.com> - 2022-07-15 10:50 -0700
      Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? George Neuner <gneuner2@comcast.net> - 2022-07-17 16:52 -0400
        Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? Thomas Koenig <tkoenig@netcologne.de> - 2022-07-18 05:44 +0000
      Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? George Neuner <gneuner2@comcast.net> - 2022-07-17 18:01 -0400
  Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? Kaz Kylheku <480-992-1380@kylheku.com> - 2022-07-15 14:41 +0000
  Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? "matt.ti...@gmail.com" <matt.timmermans@gmail.com> - 2022-07-16 05:32 -0700
  Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? Christopher F Clark <christopher.f.clark@compiler-resources.com> - 2022-07-17 13:10 -0400
    Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? gah4 <gah4@u.washington.edu> - 2022-07-17 20:39 -0700
      Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? gah4 <gah4@u.washington.edu> - 2022-07-19 16:39 -0700
        Re: Why does the lexer convert text integer lexemes to binary integers? I thought that lexers should be simple? luser droog <luser.droog@gmail.com> - 2022-07-21 14:16 -0700
      Scannerless parsing was: Why does the lexer convert text integer lexemes ...? "Ev. Drikos" <drikosev@gmail.com> - 2022-07-21 13:41 +0300
        Re: Scannerless parsing was: Why does the lexer convert text integer lexemes ...? "Ev. Drikos" <drikosev@gmail.com> - 2022-07-22 12:29 +0300

csiph-web