Loading huge files in background

[jcblum]

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How to use future/promises to read rds files in background to decrease initial loading latency in IE11

Hi! I have an app where there is some initial loading latency in IE11. After posting my issue in shinyapps.io community, I got advised to use future/promises packages and apply this concept in order to load my 3 files in background at the same time. And after reading about async programming, I tried to implement the following: I have three rds files to read, and then update the choices of selectinput accordingly. Globally I have: library(promises) library(future) plan(multiprocess) promise_m <- future( readRDS("www/mouse.rds") ) promise_h <- future(readRDS("www/human.rds")) promise_d <- future( readRDS("www/drosophila.rds") ) In the server shiny I have: observeEvent(input$genome, {…

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