Found interesting behaviour of MS C# environment while solving 415E - Mashmokh and Reverse Operation — adding single line Console.Write("") suddenly increases performance by 30%.

Compare two solutions 6429939 and 6429944. They differs only in one line, add their execution times are accordingly 2105ms and 1777ms.

Several facts:

• putting that line in the very beginning of the program is of no avail
• putting that line right before outputting the result is of no avail
• performance burst is notable only when output is huge (is this case ~1MB)

Any ideas?