On 9/07/2022 1:10 am, Colin Paice wrote:
I was told
If it executes
1. a million times a second - write in assembler
2. a thousand times a second write it in cobol or C
3. once a second - write it in Java
4. Else /bash/rexx/
Probably not an accurate picture these days.
It would have to be a very select piece of assembler to have any
significant advantage over C / C++. C and C++ have the advantage that
the compiler doesn't have to produce maintainable or comprehensible
code, so it can do lots of optimizations, inlining, loop unrolling etc.
- whatever the compiler writers found produces the fastest code. Of
course you can do the same in assembler - it is just a question of
whether it is practicable for larger pieces of code.
Java: that is probably reasonable if you are talking about starting a
JVM from scratch every time e.g. like a z/OS batch job. If you are
talking about a routine executed by a running program, I would expect
Java to be close to C. (Certainly not 3 orders of magnitude different.)
--
Andrew Rowley
Black Hill Software
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