George Marrows georgemarrows

## perf.md

      
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              April 11, 2017 14:03
            
              
                Performance improvements for Julia Diagonal * Vector etc
              
          
    Performance tests for JuliaLang/julia#21302
begin
    n = 1000
    mats = [ (Diagonal(randn(n)),
              randn(n, n)),

             (Diagonal(randn(n) + im * randn(n)),
              randn(n, n) + im*randn(n, n)),

  
## __notes.md

      
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              October 5, 2016 19:32
            
              
                Attempt at providing an `llvm39` homebrew formula for homebrew-versions
              
          
    This is currently just a light SHA update of the current llvm formula, which is at
3.8.1. Not surprisingly it ends up looking a lot like Godin's update of llvm to 3.9.0
here: Homebrew/homebrew-core#4579 . LLVM switched to CMake-based
builds after 3.8. This is why I haven't adapted the current llvm38 formula
because it (probably) requires a good bit of changing to move it over from autoconfig.
Current status


brew install llvm39 builds to completion - see _latest_build.txt
creates /usr/local/opt/llvm39 directory as a symlink to /usr/local/Cellar/llvm39/3.9.0/
brew test llvm39 fails on the first C++ build with problems finding stdarg.h - see _test_failure.txt


## wmts_tilejson.json
{
"tilejson":"2.0.0",
"tiles":["http://services.arcgisonline.com/arcgis/rest/services/Demographics/USA_Population_Density/MapServer/WMTS/?Layer=0&Style=default&TileMatrixSet=EPSG:3857&Service=WMTS&Request=GetTile&Version=1.0.0&Format=image/png&TileMatrix={z}&TileCol={x}&TileRow={y}"]
}

## hash_clash.rb
# Produces a histogram illustrating key collisions.
# A round consists of repeatedly drawing a value from 0..255
# until we first see a duplicate value. We count how many draws
# were needed to hit that first duplicate.
# Repeat for 1 million rounds, then draw a histogram showing
# num draws vs num rounds with that num draws.
#
# English escapes me - just read the code!
#
# Written to illustrate comments in this article
	{
	"tilejson":"2.0.0",
	"tiles":["http://services.arcgisonline.com/arcgis/rest/services/Demographics/USA_Population_Density/MapServer/WMTS/?Layer=0&Style=default&TileMatrixSet=EPSG:3857&Service=WMTS&Request=GetTile&Version=1.0.0&Format=image/png&TileMatrix={z}&TileCol={x}&TileRow={y}"]
	}
	# Produces a histogram illustrating key collisions.
	# A round consists of repeatedly drawing a value from 0..255
	# until we first see a duplicate value. We count how many draws
	# were needed to hit that first duplicate.
	# Repeat for 1 million rounds, then draw a histogram showing
	# num draws vs num rounds with that num draws.
	#
	# English escapes me - just read the code!
	#
	# Written to illustrate comments in this article