On 03/01/2012 11:14 AM, Sven Van Caekenberghe wrote:
Camillo,
On 01 Mar 2012, at 10:54, Camillo Bruni wrote:
I recently started to hack around Monticello due to very low response times
when having a huge package cache.
Now interestingly the FilePlugin primitives for listing files are horrible!
Example:
-----------------------------------------------------------
MC often requests a list of all mzc's cached locally:
(FileDirectory default / 'package-cache') entries
In my case there are 4300 mczs in the shared package-cache
timeToRun yields a nightmarish 2050ms for this,
further investigation leads to the fact that most of the time is spent in the
file primitive!
Now thats some 2ms for a single directory entry!
[Just as a side note, ruby1.8 does the same job in 10ms :D]
-----------------------------------------------------------
primLookupEntryIn: fullPath index: index
<primitive: 'primitiveDirectoryLookup' module: 'FilePlugin'>
-----------------------------------------------------------
I think we should definitely add another primitive which directly lists
the file under a certain path.
Of course this will break compatibility with existing code, but
I think the current approach does not scale...
best
cami
I have
(FileDirectory default / 'package-cache') entries size 5053
[ (FileDirectory default / 'package-cache') entries ] timeToRun 2012
But if I run it in the Time Profiler, I get this:
How do you manage to track the primitive ?
You could give SystemProfiler a shot.
[1] http://www.squeaksource.com/SystemProfilerPharo.html
Cheers
Philippe
