Different performance after 2 launches

[jpofmars]

Hello Everybody,

I use biogo to retrieve data from tabixed file for a VCF file. I use go routine and each routine use a preloaded index and a specific access to the tabixed file (for exemple 8 routines are used with GOMAXPROC=8).
All seem to work fine however when I launch the script, it take ~2 seconds for 1000 rows. (cpu < 100% during all the process) and when it done, If I relaunch it for the same file (same parameters) , it take ~300ms for 1000 rows (cpu > 700% during all the process).

I use the NewChunkReader function to retrieve data after get region with Chunks function.
When I load file I use bgzf.NewReader function with rd = 1

Is it normal to have this behaviour ?

thank you

[kortschak]

This sounds like disk cache warmth to me. However, please take questions to https://groups.google.com/forum/#!forum/biogo-user.