How fast loggedInUser() function is?

RE: How fast loggedInUser() function is?

Mike Schmitt — Tue, 22 Jan 2019 16:03:10 GMT

I would also add that using a local variable can be very helpful when it comes time to test - in other words, if you need to test a rule or interface's behavior when it sees a specific username, if you have "loggedinuser()" at several places in your rule/interface, you would need to replace those with the username you want to test, then undo that later. If you have 1 local variable set, however, you just need to quickly swap in the username to test, then switch it back, all in that one spot.

RE: How fast loggedInUser() function is?

Robert Shankin — Tue, 22 Jan 2019 15:43:44 GMT

I like how sriranjanir explains it.:
In general, smart reuse of load variables is an important design practice to be mindful of as unnecessary reevaluation of the same expression or function comes with a cost.

Another common offender is over use of fn!isUserMemberOfGroup(). This function can get expensive when it's overused - if a design has this in multiple sections on the same interface, or multiple interfaces in the same process, it might be a good idea to consider how you can test for this early, once, and retain the answer for later use.

RE: How fast loggedInUser() function is?

sriranjanir — Tue, 22 Jan 2019 12:09:49 GMT

Hi Sergeiz,

I would say it's better to save in local variable and re-use in all places.
Please paste the below code in expression rule and check time taken.
CODE 1:

with(
local!userLogged: loggedInUser(),
local!email: user(
local!userLogged,
"email"
),
local!firstName: user(
local!userLogged,
"firstName"
),
{
local!email,
local!firstName
}
)

Time take : <5ms

CODE 2:

with(
local!userLogged: loggedInUser(),
local!email: user(
loggedInUser(),
"email"
),
local!firstName: user(
loggedInUser(),
"firstName"
),
{
local!email,
local!firstName
}
)

Time Taken: 5ms

Hope this helps.