This is a compiled list of falsehoods programmers tend to believe about working with time.
Don't re-invent a date time library yourself. If you think you understand everything about time, you're probably doing it wrong.
| param($global:RestartRequired=0, | |
| $global:MoreUpdates=0, | |
| $global:MaxCycles=5, | |
| $MaxUpdatesPerCycle=500) | |
| $Logfile = "C:\Windows\Temp\win-pre-provision.log" | |
| $EC2ConfigZipPath = "C:\Installers" | |
| $PostScriptPath = "A:\win10-post.ps1" | |
| $PostScript = $(Split-Path $PostScriptPath -Leaf) |
| 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 |
| #!/bin/bash | |
| [[ -z $1 ]] && echo "Usage: \"$0\" [sleep interval in seconds]" && exit 99 | |
| LOCKFILE=/tmp/.${0##*/}.exclusivelock | |
| SLEEP_INTERVAL=$1 | |
| WAIT=30 | |
| declare -A LOCK_FDS=() | |
| lock() { |
If your system is running slowly, perhaps a process is using too much CPU time and won't let other processes run smoothly. To find out which processes are taking up a lot of CPU time, you can use Apple's Activity Monitor.
The CPU pane shows how processes are affecting CPU (processor) activity:
| import os | |
| import sys | |
| from warnings import warn | |
| virtualenv = os.environ.get('VIRTUAL_ENV') | |
| if virtualenv: | |
| version = os.listdir(os.path.join(virtualenv, 'lib'))[0] |
| --- | |
| - hosts: teleport:teleport_auth:teleport_proxy | |
| gather_facts: False | |
| vars: | |
| systemd_service_dir: /lib/systemd/system | |
| tasks: | |
| - name: CAUTION! WARNING! DANGER! | |
| pause: | |
| prompt: "You are about to wipe this teleport (There is no going back!) [Press Ctrl+C and then 'A' to abort]" |
| scrape_configs: | |
| {% for server in prometheus_scrape %} | |
| - job_name: {{ server.split('.')[0] }} | |
| static_configs: | |
| - targets: | |
| - '{{ server }}' | |
| {% endfor %} |
| .DS_Store | |
| .vagrant | |
| **/*.retry | |
| inventory/devtest/hosts | |
| inventory/**/hosts.bak | |
| inventory/vagrant_ansible_inventory | |
| inventory/**/group_vars/fake_hosts.yml | |
| inventory/**/host_vars/ | |
| temp | |
| .idea |
| #!/bin/sh | |
| export JAVA_HOME=/usr/java/jdk | |
| export JRE_HOME=$JAVA_HOME/jre | |
| export J2RE_HOME=$JAVA_HOME/jre | |
| export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$J2RE_HOME/bin:$PATH |
