In my binary to text decoding application (.NET 2.0) I found that the line:

logEntryTime.ToString("dd.MM.yy HH:mm:ss:fff")

takes 33% of total processing time. Does anyone have any ideas on how to make it faster?

EDIT: This app is used to process some binary logs and it currently takes 15 hours to run. So 1/3 of this will be 5 hours.

EDIT: I am using NProf for profiling. App is processing around 17 GBytes of binary logs.

c# optimization datetime formatting
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