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Krzysztof Kowalczyk kjk

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View NoFreeAllocator.cpp
/* Copyright 2014 the SumatraPDF project authors (see AUTHORS file).
License: Simplified BSD (see COPYING.BSD) */
/* NOTE: this is unfinished work in progress */
/* NoFreeAllocator (ScratchAllocator ?) is designed for quickly and easily
allocating temporary memory that doesn't outlive the stack frame
in which it was allocated.
Consider this piece of code:
@kjk
kjk / go_smaz_faster.md
Created Dec 11, 2014
Improving smaz benchmarking
View go_smaz_faster.md

Before:

Krzysztofs-MacBook-Pro-4:go-smaz kkowalczyk$ go test -bench=.
PASS
BenchmarkCompression	     500	   3451735 ns/op	  39.60 MB/s
BenchmarkDecompression	     500	   2740847 ns/op	  27.58 MB/s

After:

Krzysztofs-MacBook-Pro-4:go-smaz kkowalczyk$ go test -bench=.
View ProgramVersion.cs
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Text;
/* This code was written by Krzysztof Kowalczyk (http://blog.kowalczyk.info)
and is placed in public domain. */
@kjk
kjk / test_gob.go
Created Dec 18, 2013
Shows that one cannot append data to a gob file - the decoder will error out with 'extra data in buffer` when trying to decode data written by append.
View test_gob.go
package main
import (
"encoding/gob"
"fmt"
"io"
"log"
"math/rand"
"os"
)
@kjk
kjk / show_caller_name.go
Last active Dec 31, 2015
Shows that we can get the caller's function name without access to source code. go build -o test show_caller_name.go; rm show_caller_name.go; ./test
View show_caller_name.go
package main
import (
"bytes"
"fmt"
"runtime"
)
var (
dunno = []byte("???")
View dump_pe.py
import os
import pefile
# needs https://code.google.com/p/pefile/ to be installed
# i.e. download it, extract and python setup.py install
d = os.path.join("win", "Debug")
files = os.listdir(d)
def is_pe(s):
if s.endswith(".dll"):
@kjk
kjk / reflect_slice.go
Created Aug 31, 2018
How to create a reflect slice
View reflect_slice.go
package main
import (
"fmt"
"log"
"reflect"
)
type S struct {
N int
@kjk
kjk / cmd-git-log.go
Created Mar 21, 2019
Compare output of 2 git log --format=oneline commands to see commits unique in each branch
View cmd-git-log.go
package main
import (
"bytes"
"fmt"
"io/ioutil"
"strings"
)
/*
View program_version.py
#!/usr/bin/env python
# This code was written by Krzysztof Kowalczyk (http://blog.kowalczyk.info)
# and is placed in public domain.
def v2fhelper(v, suff, version, weight):
parts = v.split(suff)
if 2 != len(parts):
return v
version[4] = weight
View keybase.md

Keybase proof

I hereby claim:

  • I am kjk on github.
  • I am kjksf (https://keybase.io/kjksf) on keybase.
  • I have a public key ASAdCRkKmAhWMJJsU_q76BM_JyYK5-MZMrwrr6qTOk3WEwo

To claim this, I am signing this object: