ericlagergren

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#ifdef _MSC_VER
#include <intrin.h> /* for rdtscp and clflush */
#pragma optimize("gt",on)
#else
#include <x86intrin.h> /* for rdtscp and clflush */
#endif

ericlagergren

// Functions from Go's strings package usable as template actions
// with text/template.
//
// This approach assumes you have some context type as a receiver,
// but if you just need the functions check out the FuncMap variant
// below.
// 
// Commented functions are not deemed useful in template actions.
// Haven't actually used this, but this is one possible way of doing it.
// Another option is to fill a FuncMap with most of the strings package.

ericlagergren

#!/bin/bash
#
# For more info see https://golang.org/doc/install.html, the instructions there are all
# that is needed to install Go.
#
# DO NOT RUN with sudo; Go should be installed under the user not root.  Using sudo will
# cause problems.

set -euo pipefail

ericlagergren

Latency Comparison Numbers
--------------------------
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
Send 1K bytes over 1 Gbps network        10,000   ns    0.01 ms
Read 4K randomly from SSD*              150,000   ns    0.15 ms

ericlagergren

$ ssh -A vm
$ git config --global url."git@github.com:".insteadOf "https://github.com/"
$ cat ~/.gitconfig
[url "git@github.com:"]
	insteadOf = https://github.com/
$ go get github.com/private/repo && echo Success!
Success!

ericlagergren

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