Slow Interactions Recently

[brodieG]

Last time I looked into a failing unitizer it ran very slowly. It might have been due to a large set of loaded namespaces. Need to examine this.

[brodieG]

Oddly the slowness is after an expression is computed at the prompt, manifesting between result display and new prompt display. But help display is fast. History?

Oh boy, someone added a gc to showConnections:

> f <- tempfile()
> zz <- unitizer:::history_capt(f)
> unitizer:::history_write('hello')
Error in unitizer:::history_write("hello") : 
  is.open_con(hist.con) is not TRUE
> unitizer:::history_write(zz$con, 'hello')
> hello
Error: object 'hello' not found
> unitizer:::history_write(zz$con, 'hello')
> treeprof::treeprof( unitizer:::history_write(zz$con, 'hello'))
Profiling
auto gc: running with gc() first
First run in 0.538 seconds
Looping to 5 seconds
Parsing Rprof
Done
Ticks: 1589; Iterations: 10; Time Per: 401.0 milliseconds; Time Total: 4.010 seconds; Time Ticks: 1.589

                                              milliseconds
unitizer:::history_write ----------------- : 401.0 -   0.0
    stopifnot ---------------------------- : 143.3 -   0.0
    |   ...elt --------------------------- : 143.3 -   0.0
    |       is.open_con ------------------ : 143.3 -   0.0
    |           isTRUE ------------------- : 143.3 -   0.0
    |               is.valid_con --------- : 143.3 -   0.0
    |                   showConnections -- : 143.3 -   0.0
    |                       gc ----------- : 143.3 - 143.3
    try ---------------------------------- : 138.3 -   0.0
    |   loadhistory ---------------------- : 138.3 -   0.0
    |       showConnections -------------- : 138.3 -   0.0
    |           gc ----------------------- : 138.3 - 138.3
    is.open_con -------------------------- : 119.1 -   0.0
        isTRUE --------------------------- : 119.1 -   0.0
            is.valid_con ----------------- : 119.1 -   0.0
                showConnections ---------- : 119.1 -   0.0
                    gc ------------------- : 119.1 - 119.1