Open the console inside the developer tools. It should contain entries whose contents are:

default: <some time>

default: <some time>

default: <some time>

default: <some time> extra data

default: <some time>

default: <some time>

default: <some time> extra data

default: <some time>

default: <some time>

default: <some time> extra data

default: <some time>

custom toString(): <some time>

custom toString(): <some time> extra data

custom toString(): <some time>

a label: <some time>

a label: <some time> extra data

a label: <some time>

[some warning message indicating that a timer for label "b" does not exist]