Progress updates generated by progressr are
formally R conditions of class progression that are
signalled and handled by R’s condition framework. Sometimes these
progression conditions are not signalled, or transmitted,
as expected. To troubleshoot such problems, we can use the built-in
“debug” handler. For example,
> library(progressr)
> handlers("debug")
> handlers(global = TRUE)
>
> y <- slow_sum(1:3)
[21:17:01.786] (0.000s => +0.015s) initiate: 0/3 (+0) '' {clear=TRUE, enabled=TRUE, status=}
[21:17:01.975] (0.189s => +0.179s) update: 0/3 (+0) '' {clear=TRUE, enabled=TRUE, status=}
[21:17:02.378] (0.593s => +0.002s) update: 0/3 (+0) '' {clear=TRUE, enabled=TRUE, status=}
[21:17:02.581] (0.796s => +0.002s) update: 1/3 (+1) 'P: Adding 1' {clear=TRUE, enabled=TRUE, status=}
M: Added value 1
[21:17:02.788] (1.002s => +0.004s) update: 1/3 (+0) 'P: Adding 1' {clear=TRUE, enabled=TRUE, status=}
[21:17:02.990] (1.205s => +0.001s) update: 1/3 (+0) 'P: Adding 1' {clear=TRUE, enabled=TRUE, status=}
[21:17:03.394] (1.608s => +0.002s) update: 1/3 (+0) 'P: Adding 1' {clear=TRUE, enabled=TRUE, status=}
[21:17:03.597] (1.812s => +0.002s) update: 2/3 (+1) 'P: Adding 2' {clear=TRUE, enabled=TRUE, status=}
M: Added value 2
[21:17:03.807] (2.021s => +0.007s) update: 2/3 (+0) 'P: Adding 2' {clear=TRUE, enabled=TRUE, status=}
[21:17:04.010] (2.224s => +0.001s) update: 2/3 (+0) 'P: Adding 2' {clear=TRUE, enabled=TRUE, status=}
[21:17:04.412] (2.627s => +0.001s) update: 2/3 (+0) 'P: Adding 2' {clear=TRUE, enabled=TRUE, status=}
[21:17:04.616] (2.830s => +0.002s) update: 3/3 (+1) 'P: Adding 3' {clear=TRUE, enabled=TRUE, status=}
[21:17:04.618] (2.832s => +0.004s) update: 3/3 (+0) 'P: Adding 3' {clear=TRUE, enabled=TRUE, status=}
M: Added value 3
>