[Patch, fortran, RFC] PR 40958 Reduce size of module files

[Mikael Morin]

On Friday 25 November 2011 11:10:01 Janne Blomqvist wrote:
> Based on a brief inspection of the code, most if
> not all of these seeks are for a very short distance (typically peek a
> few bytes ahead in the stream, then seek back)
I'm afraid they aren't.
The moves are as follows (-: sequential, x: seek)
--> beginning of file
  - skip operator interfaces
  - skip user operators
  - skip commons, equivalences, and derived type extensions
  - register the offset of each symbol node and skip it
  -   (this is usually
  -    the biggest part of the module)
  - read the symtree list and mark needed the associated symbols (if they are 
wanted)
--> end of file
  x go back to operator interfaces and load them
  - load user operators
  - load commons
  - load equivalences
  xxxxxxx now the required symbols are known, so for each one of them seek to 
its offset and load it. This requires a lot of seeks, and if the number of 
symbols, components etc is high in the module, they are not necessarily "short 
distance"
  x load derived type extensions


We'll see the results from Salvatore, but I'm not very optimistic.

Mikael