Add benchmarks script

[mforets]

No description provided.

[mforets]

note: some of these "real life" benchmarks can be heavy (and i didn't add all SLICOT benchs), so i doubt that we want to pack this with Expokit. instead it seems better having the link to another repository where they can be obtained using Base.download.

[mforets]

Results in this branch, and julia v0.6

ID	time	GC time	memory	allocations
["SLICOT", "(\"CDplayer\", 120, \"c\")"]	16.076 μs (5%)		49.97 KiB (1%)	91
["SLICOT", "(\"CDplayer\", 120, \"u\")"]	1.047 ms (5%)		1.58 MiB (1%)	277
["SLICOT", "(\"MNA_5\", 10913, \"c\")"]	12.721 ms (5%)		2.96 MiB (1%)	96
["SLICOT", "(\"MNA_5\", 10913, \"u\")"]	13.263 ms (5%)		2.96 MiB (1%)	96
["SLICOT", "(\"beam\", 348, \"c\")"]	4.697 ms (5%)		498.63 KiB (1%)	105
["SLICOT", "(\"beam\", 348, \"u\")"]	4.661 ms (5%)		498.63 KiB (1%)	105
["SLICOT", "(\"build\", 48, \"c\")"]	457.934 μs (5%)		557.13 KiB (1%)	122
["SLICOT", "(\"build\", 48, \"u\")"]	498.871 μs (5%)		557.13 KiB (1%)	122
["SLICOT", "(\"iss\", 270, \"c\")"]	19.667 μs (5%)		87.31 KiB (1%)	64
["SLICOT", "(\"iss\", 270, \"u\")"]	259.437 μs (5%)		378.88 KiB (1%)	84
["SLICOT", "(\"pde\", 84, \"c\")"]	180.027 μs (5%)		272.84 KiB (1%)	80
["SLICOT", "(\"pde\", 84, \"u\")"]	179.291 μs (5%)		272.56 KiB (1%)	77
["SLICOT", "(\"tline\", 256, \"c\")"]	12.616 μs (5%)		83.08 KiB (1%)	64
["SLICOT", "(\"tline\", 256, \"u\")"]	482.162 μs (5%)		716.97 KiB (1%)	135

julia> versioninfo()
Julia Version 0.6.4
Commit 9d11f62bcb (2018-07-09 19:09 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin14.5.0)
  CPU: Intel(R) Core(TM) i5-5250U CPU @ 1.60GHz
  WORD_SIZE: 64
  BLAS: libopenblas (USE64BITINT DYNAMIC_ARCH NO_AFFINITY Haswell MAX_THREADS=16)
  LAPACK: libopenblas64_
  LIBM: libopenlibm
  LLVM: libLLVM-3.9.1 (ORCJIT, broadwell)

[mforets]

Unfortunately, PkgBenchmark doesn't seem to be ready yet in v0.7; i get

julia> benchmarkpkg("Expokit")
...
WARNING: Base.LibGit2 is deprecated, run `import LibGit2` instead
 in module PkgBenchmark
ERROR: UndefVarError: JULIA_HOME not defined
Stacktrace:
 [1] BenchmarkConfig() at /Users/mforets/.julia/packages/PkgBenchmark/9X8l2/src/benchmarkconfig.jl:51
 [2] benchmarkpkg(::String) at /Users/mforets/.julia/packages/PkgBenchmark/9X8l2/src/runbenchmark.jl:42
 [3] top-level scope at none:0

[mforets]

Unfortunately, PkgBenchmark doesn't seem to be ready yet in v0.7; i get

This is probably fixed in JuliaCI/PkgBenchmark.jl#68