Ross Spencer ross-spencer

## latency.markdown

      
              2 files
            
          
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                hellerbarde
                / latency.markdown
            
            
              Created
              May 31, 2012 13:16
                — forked from jboner/latency.txt
            
              
                Latency numbers every programmer should know
              
          
    Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

  
## README.md

      
              3 files
            
          
              37 forks
            
          
              21 comments
            
          
              235 stars
            
          
                hubgit
                / README.md
            
            
              Last active
              May 27, 2024 03:48
            
              
                Remove metadata from a PDF file, using exiftool and qpdf. Note that embedded objects may still contain metadata.
              
          
    Anonymising PDFs

PDF metadata

Metadata in PDF files can be stored in at least two places:

the Info Dictionary, a limited set of key/value pairs
XMP packets, which contain RDF statements expressed as XML

PDF files


## gist:7360908

      
              1 file
            
          
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              1029 comments
            
          
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                rxaviers
                / gist:7360908
            
            
              Last active
              June 8, 2024 15:23
            
              
                Complete list of github markdown emoji markup
              
          
    People


 :bowtie:
😄 :smile:
😆 :laughing:


😊 :blush:
😃 :smiley:
☺️ :relaxed:


😏 :smirk:
😍 :heart_eyes:
😘 :kissing_heart:


😚 :kissing_closed_eyes:
😳 :flushed:
😌 :relieved:


😆 :satisfied:
😁 :grin:
😉 :wink:


😜 :stuck_out_tongue_winking_eye:
😝 :stuck_out_tongue_closed_eyes:
😀 :grinning:


😗 :kissing:
😙 :kissing_smiling_eyes:
😛 :stuck_out_tongue:


## True Trello Printer
<!DOCTYPE html>
<html>
 <head>
  <meta charset="UTF-8">
  <title>True Trello Printer</title>
  <link href="http://netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
<style>
body{margin:15%;}

.panel-body{

## scratchpad.md

      
              1 file
            
          
              2 forks
            
          
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              8 stars
            
          
                bitsgalore
                / scratchpad.md
            
            
              Last active
              June 6, 2024 12:55
            
          
    Experimental attempt at getting organized ...
05/06/2024

Mastodon preview cards

This explains setup on Jekyll site:

  
## pico8.txt
Screen resolutions
------------------

PICO-8 supports different undocumented videomodes that can be activated at runtime,
using poke(0x5F2C, X) where X is one of the following mode numbers:

0: 128x128, 0 pages
1: 64x128, 1 page
2: 128x64, 1 page
3: 64x64, 3 pages

## extend.json
{
  "formats": [
    {
      "format": {
        "id": "archives-nz-dev-signature/1",
        "name": "Adobe Air",
        "version": "1.0",
        "mime": "application/vnd.adobe.air-application-installer-package+zip",
        "extensions": [
          "air"

## sf build -tags sqliteanalysis
// PREPARATORY CHANGES TO SF
1. Use existing -hash flag but change behaviour so can accept a comma separated list of hashes e.g. -hash md5,ssdeep
2. change hash.go file (under /cmd/) so that checksum var is a slice of hashes var checksum []hash.Hash
3. writer interface (cmd/writers.go) updated so writeFile method takes a slice of byte slices for checksum digests (checksum [][]byte)
And all writers (JSON, CSV, YAML etc) updated so they can accept multiple checksum digests.
4. in cmd/sf.go update the identifyRdr func so it ranges through the slice of checksums, calculating for each, and returns a slice of byte slices for checksum digests

// SQLITEANALYSIS CHANGES
5. copy the hash.go flag as hash_sqliteanalysis.go and prepend build tag
6. add spamspam as an import and update the functions in this file

## breakdown.md

      
              1 file
            
          
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              3 comments
            
          
              1 star
            
          
                anjackson
                / breakdown.md
            
            
              Last active
              November 9, 2015 00:27
            
              
                Ideal WARC ID result?
              
          
    When analysing example.warc.gz containing a HTML response that was GZip encoded.

application/warc

application/gzip 
(outer gzip chunk)

application/warc; version="1.0", type=response 
(The whole WARC Record)

application/http; msgtype=response 
(WARC Record content, i.e. HTTP headers and entity body)

application/gzip 
(i.e. the entity body is compressed)

text/html; version=5


## pcdm.ttl
charper:~$ rapper -i rdfxml -o turtle models.rdf -O https://raw.githubusercontent.com/duraspace/pcdm/master/models.rdf
rapper: Parsing URI file:///home/charper/models.rdf with parser rdfxml
rapper: Serializing with serializer turtle and base URI https://raw.githubusercontent.com/duraspace/pcdm/master/models.rdf
@base <https://raw.githubusercontent.com/duraspace/pcdm/master/models.rdf> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix ldp: <http://www.w3.org/ns/ldp#> .
@prefix ore: <http://www.openarchives.org/ore/terms/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
`:bowtie:`	😄 `:smile:`	😆 `:laughing:`
😊 `:blush:`	😃 `:smiley:`	☺️ `:relaxed:`
😏 `:smirk:`	😍 `:heart_eyes:`	😘 `:kissing_heart:`
😚 `:kissing_closed_eyes:`	😳 `:flushed:`	😌 `:relieved:`
😆 `:satisfied:`	😁 `:grin:`	😉 `:wink:`
😜 `:stuck_out_tongue_winking_eye:`	😝 `:stuck_out_tongue_closed_eyes:`	😀 `:grinning:`
😗 `:kissing:`	😙 `:kissing_smiling_eyes:`	😛 `:stuck_out_tongue:`
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8">
	<title>True Trello Printer</title>
	<link href="http://netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css" rel="stylesheet">
	<style>
	body{margin:15%;}

	.panel-body{
	Screen resolutions
	------------------

	PICO-8 supports different undocumented videomodes that can be activated at runtime,
	using poke(0x5F2C, X) where X is one of the following mode numbers:

	0: 128x128, 0 pages
	1: 64x128, 1 page
	2: 128x64, 1 page
	3: 64x64, 3 pages
	{
	"formats": [
	{
	"format": {
	"id": "archives-nz-dev-signature/1",
	"name": "Adobe Air",
	"version": "1.0",
	"mime": "application/vnd.adobe.air-application-installer-package+zip",
	"extensions": [
	"air"
	// PREPARATORY CHANGES TO SF
	1. Use existing -hash flag but change behaviour so can accept a comma separated list of hashes e.g. -hash md5,ssdeep
	2. change hash.go file (under /cmd/) so that checksum var is a slice of hashes var checksum []hash.Hash
	3. writer interface (cmd/writers.go) updated so writeFile method takes a slice of byte slices for checksum digests (checksum [][]byte)
	And all writers (JSON, CSV, YAML etc) updated so they can accept multiple checksum digests.
	4. in cmd/sf.go update the identifyRdr func so it ranges through the slice of checksums, calculating for each, and returns a slice of byte slices for checksum digests

	// SQLITEANALYSIS CHANGES
	5. copy the hash.go flag as hash_sqliteanalysis.go and prepend build tag
	6. add spamspam as an import and update the functions in this file
	charper:~$ rapper -i rdfxml -o turtle models.rdf -O https://raw.githubusercontent.com/duraspace/pcdm/master/models.rdf
	rapper: Parsing URI file:///home/charper/models.rdf with parser rdfxml
	rapper: Serializing with serializer turtle and base URI https://raw.githubusercontent.com/duraspace/pcdm/master/models.rdf
	@base <https://raw.githubusercontent.com/duraspace/pcdm/master/models.rdf> .
	@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
	@prefix dcterms: <http://purl.org/dc/terms/> .
	@prefix ldp: <http://www.w3.org/ns/ldp#> .
	@prefix ore: <http://www.openarchives.org/ore/terms/> .
	@prefix owl: <http://www.w3.org/2002/07/owl#> .
	@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .