copy pasting code for better performance

[lemire]

By copy pasting the url and regular code, we might be able to improve the performance.

Before:

|                  Method |                    FileName |        Mean |        Error |    StdDev | Speed (GB/s) |
|------------------------ |---------------------------- |------------:|-------------:|----------:|------------- |
| SSEDecodingRealDataUTF8 | data/dns/swedenzonebase.txt | 28,228.5 us | 11,552.43 us | 633.23 us |         1.24 |
| SSEDecodingRealDataUTF8 |                 data/email/ |    492.9 us |     56.68 us |   3.11 us |         4.01 |

After:

|                  Method |                    FileName |        Mean |        Error |    StdDev | Speed (GB/s) |
|------------------------ |---------------------------- |------------:|-------------:|----------:|------------- |
| SSEDecodingRealDataUTF8 | data/dns/swedenzonebase.txt | 19,262.0 us | 10,121.23 us | 554.78 us |         1.82 |
| SSEDecodingRealDataUTF8 |                 data/email/ |    467.5 us |      2.85 us |   0.16 us |         4.23 |

The 'email' dataset may not show any difference, but it seems that there is a clear difference in the swedenzonebase.txt case. I am not 100% sure why that is, but it is likely that the dynamic parameter increases the function call overhead (the swedenzonebase.txt is made of repeated calls over short strings).

[lemire]

@Nick-Nuon Please review.

[Nick-Nuon]

It looks good. I also get similar numbers on my machine.
The extra parameter seems to be a reasonable explanation(or at least I cant think of any others).
Merging.