timeline.png...

timeline-not-cacheable.png...

overlapping-outputs-timeline.png...

fossil open --keep hello.fossil

fossil add hello.go
fossil commit --no-prompt --nosign --date-override 2017-09-22T01:19:07Z --comment 'hello world'

fossil timeline --oneline
cmp stdout .fossil-timeline

-- .fossil-timeline --
d4c7dcdc29 hello world
58da0d15e9 initial empty check-in
+++ no more data (2) +++
-- hello.go --
package main

func main() {
	println("hello, world")

  It also shows a table of specific goroutine instances, with various
  execution statistics and a link to the event timeline for each one.

  The timeline displays only the selected goroutine and any others it
  interacts with via block/unblock events. (The timeline is
  goroutine-oriented rather than logical processor-oriented.)
</p>

<h2>Profiles</h2>
<p>

}

type HeapCountersArg struct {
	Allocated uint64
	NextGC    uint64
}

const (
	ProcsSection = 0 // where Goroutines or per-P timelines are presented.
	StatsSection = 1 // where counters are presented.
	TasksSection = 2 // where Task hierarchy & timeline is presented.
)

type GoroutineCountersArg struct {
	Running   uint64
	Runnable  uint64
	GCWaiting uint64
}

type ThreadCountersArg struct {

	for {
		// If the tree head looks old, check that it is on our timeline.
		if tree.N <= latest.N {
			if err := c.checkTrees(tree, msg, latest, latestMsg); err != nil {
				return 0, err
			}
			if tree.N < latest.N {
				return msgPast, nil
			}
			return msgNow, nil
		}

		// The tree head looks new. Check that we are on its timeline and try to move our timeline forward.

go mod edit -require rsc.io/quote@v1.5.2
! go mod tidy
stderr 'go: rsc.io/quote@v1.5.2: verifying go.mod: checksum mismatch'
stderr 'SECURITY ERROR\n'

rm go.sum

# switching to truthful sumdb detects timeline inconsistency
cp go.mod.orig go.mod
env GOSUMDB=$sumdb
! go get rsc.io/fortune
stderr 'SECURITY ERROR\ngo.sum database server misbehavior detected!'
stderr 'proof of misbehavior:'

	const deprecated = "This is a cadvisor flag that was mistakenly registered with the Kubelet. Due to legacy concerns, it will follow the standard CLI deprecation timeline before being removed."

	registerDeprecated(global, local, "application_metrics_count_limit", deprecated)
	registerDeprecated(global, local, "boot_id_file", deprecated)

Click on a category to see a timeline screen that highlights tasks of that category.

image::performance/task-execution-cacheable.png[title="A task oriented view of performance"]

image::performance/timeline-not-cacheable.png[title="Timeline screen with 'not cacheable' tasks only"]

Sort by task duration on the timeline screen to highlight tasks with great time saving potential.