Simple experiment to test the effects of different techniques and options on application start up time
The goal of CDS is to reduce the startup time of the JVM by loading from a pre-processed archive of Java classes and JVM metadata that is used during the initialization process. https://dev.java/learn/jvm/cds-appcds/
| (ns flexi-clock | |
| (:import (java.time Clock Duration Instant ZonedDateTime))) | |
| (defn clock | |
| "potential library function (e.g. in tick or tempo). | |
| This just implements the platform Clock - which works because non-test code only uses that API. | |
| Any manipulation of time (which happens in testing code) is done via changing | |
| what get-instant and get-zone return" | |
| [get-instant get-zone] |
In JVM Clojure, Exceptions are for operating errors ("something went wrong") and Assertions are for programmer and correctness errors ("this program is wrong").
An assert might be the right tool if throwing an Exception isn't enough. Use
them when the assertion failing means
