add two benchmark test with new data file

[asdetrefle]

The second benchmark test is a for low level column reader call on the new data file. This is theoretically the lower bound of read time needed. We also should aim for this when we implement Column and Table. Now we can see huge potential for the current implementation:

test record_reader_10k_collect   ... bench:  17,203,101 ns/iter (+/- 109,298) = 38 MB/s
test record_reader_stock_collect ... bench: 116,401,996 ns/iter (+/- 1,467,345) = 11 MB/s
test record_reader_stock_column  ... bench:   6,892,490 ns/iter (+/- 26,985) = 187 MB/s

[coveralls]

Pull Request Test Coverage Report for Build 607

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.008%) to 95.491%

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Files with Coverage Reduction	New Missed Lines	%
encodings/encoding.rs	1	94.82%
<!--	Total:	1		-->

Totals
Change from base Build 602:	-0.008%
Covered Lines:	12049
Relevant Lines:	12618

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💛 - Coveralls

[sadikovi]

Thanks for the benchmarks! Now we need to figure out what we are going to do to improve the performance.

[sadikovi]

LGTM

[sunchao]

LGTM too. Thanks @asdetrefle !

@sadikovi : I think you should be able to merge this. Can you try it?

[sadikovi]

@sunchao Yes, I can merge as well! Thanks for the review and sign off. Now, I can help with merging PRs too. @asdetrefle - great job!