Hi Christian,

I did some performance statistics on my application and something caught my eye, which I hope you can shed some light on.

I found that when running the application the distribution of the life-cycle fases: Parsing, Compiling, Evaluating and Printing,  is:

Parsing                 :               95%,

Compiling            :               4%,

Evaluating           :               0.4% and

Printing                :               0.03% .

My development-paradigm is maintainability and not as much as performance optimization. So I expect is a lot of code-optimization during parsing and therefore a relatively high amount of time consumed for parsing. This is confirmed by the relatively low amount of time for the Compiling- and Evaluating-time. Code-optimization actually is a strong point of the parser. However I had expected/hoped that this code-optimization only occurs at the first run and that the optimized code is kept for following runs. This does not seem to be the case.

First of all: am I correct in my analysis? Secondly, can you give me any advise on improving the parsing-time, not being giving up on my development-paradigm, based on these stats?

Some more stats:

The info-view gives for the compiling -fase a total of 2124 lines of which:

• Inline ……                                                                                     923         lines
• Remove type check ….                                                           710         lines
• Simplify FLWOR ….                                                                   218         lines
• Rewrite …                                                                                    150         lines
• Unroll ….                                                                                      12           lines
• Merge: concat …..                                                                    11           lines
• Open database …                                                                     3              lines
• Swap operant …                                                                        1              lines
• Simplify catch * ….                                                                   4              lines
•  

Thnx in advance for your reply.

Rob Stapper

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