John JCJAT

## cli-snippets.md

      
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                ghotz
                / cli-snippets.md
            
            
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              January 30, 2026 22:38
            
              
                Exiftool copy & paste snippets
              
          
    CLI snippets

Image Conversion

Convert all JPGs in a directory to JPG XL with lossless conversion

for /R %i in (*.jpg) do cjxl.exe --lossless_jpeg=1 "%i" "%~dpni.JXL"
Convert all TIFFs in a directory to JPG XL with lossless conversion copying metadata (ImageMagick, worse)


## dbschema-license-key-generator.html
<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width">
    <title>DbSchema License Key Generator</title>
</head>

<body>

## opera-mac-internal-pages-and-more.md

      
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              24 stars
            
          
                christopheranderton
                / opera-mac-internal-pages-and-more.md
            
            
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              October 12, 2024 00:43
            
              
                A list of internal (and external) pages and useful information for macOS/OS X users (and others) of the Chromium/Blink based version of the web browser Opera. 
              
          
## bktree3.py
"""
bktree3.py, by phash
Based on bktree.py by bearophile ( http://code.activestate.com/recipes/572156-bk-tree/ )
Fixed for python 3

Fast Levenshtein distance and BK-tree implementations in Python.
"""

def editDistance(s1, s2):
    """Computes the Levenshtein distance between two arrays (strings too).

## exiftool-example-argsfile.ps1
#
# Exiftool example to process multiple commands without paying the initialization time
# for each call writing to an argument file
#
cls;
$Inputdir = "C:\Photos\Personal\[2007]\[2007-00-00] Test & Test"

# initializes argument file
if (Test-Path c:\temp\tmp.args) { del c:\temp\tmp.args; };
$null | Out-File c:\temp\tmp.args -Append -Encoding Ascii;

## dotnetlayout.md

      
              1 file
            
          
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              1502 stars
            
          
                davidfowl
                / dotnetlayout.md
            
            
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              April 12, 2026 15:49
            
              
                .NET project structure
              
          
    $/
  artifacts/
  build/
  docs/
  lib/
  packages/
  samples/
  src/
 tests/


## latency.txt
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD
	<!DOCTYPE html>
	<html>

	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width">
	<title>DbSchema License Key Generator</title>
	</head>

	<body>
	"""
	bktree3.py, by phash
	Based on bktree.py by bearophile ( http://code.activestate.com/recipes/572156-bk-tree/ )
	Fixed for python 3

	Fast Levenshtein distance and BK-tree implementations in Python.
	"""

	def editDistance(s1, s2):
	"""Computes the Levenshtein distance between two arrays (strings too).
	#
	# Exiftool example to process multiple commands without paying the initialization time
	# for each call writing to an argument file
	#
	cls;
	$Inputdir = "C:\Photos\Personal\[2007]\[2007-00-00] Test & Test"

	# initializes argument file
	if (Test-Path c:\temp\tmp.args) { del c:\temp\tmp.args; };
	$null \| Out-File c:\temp\tmp.args -Append -Encoding Ascii;
	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD