At last: RouteMap performs some analysis on your Signposts, and with the other tools can be used to estimate latency, and look at macOS system performance too.
blowhole
Doesn’t writing so much to the unified log result in performance penalties? So how can Apple expect us to use the log and Signposts to measure performance?
At first I thought it was my mistake. Then it looked like a simple error in the interface. But this bug in Mojave’s signposts is more complex. Here’s a workaround.
All these have now been updated and should pass Gatekeeper checks and run on both Sierra and High Sierra.
Writes to the unified log in Sierra and now High Sierra too.
Want to write to Sierra’s log from a language or app which doesn’t give easy access? Use this free tool which now writes anything you want.
Sierra 10.12.4 introduced undocumented changes in the log system which may break apps which write to the logs. Here is Blowhole fixed for that change.
A detailed tutorial showing how you can time events, such as moving from one note to the next, using free and simple tools.
This command tool can now write just the integer passed to it as a log message. This is ideal for instrumenting scripts and apps for analysis.
Here’s a tool which lets AppleScript and anything else which can run a shell command make an entry in Sierra’s logs.
The Eclectic Light Company 