[Swift-devel] Swift Performance Data

[Mihael Hategan]

On Mon, 2007-06-25 at 14:07 +0000, Ben Clifford wrote:
> 
> On Mon, 25 Jun 2007, Mihael Hategan wrote:
> 
> > This is similar to code generation vs. abstraction (or interpretation
> > vs. compilation). There can be:
> 
> its also an issue with where the abstractions happen:
> 
> > 1. An api to access the logs in structured ways
> 
> needs the API to exist in the language that you want to write analysers 
> in.
> 
> > 2. A log translator
> 
> makes the API into a posix filesystem with text files. still needs a 
> per-language parser to parse that format, but that is 'simple' and works 
> in a variety of languages. so I'd favour this.

So would I. And since logs are incremental, it could even be done live
(i.e. tail -f log |translator >translated.log). It would also be
"backwards compatible" with the logs that we've been gathering so far :)

> 
> > 3. An adaptor plugged in at the log4j (or whatever logging library)
> > level that does the translation dynamically (at the expense of
> > performance).
> 
> Possibly some components can output stuff into a common format using log4j 
> - that wouldn't necessarily be any more dynamic than the existing log4j 
> output.

Right, but that would not be the general case.

>