[R] why a moving average fun takes too long time!!

[Jonsson]

I am calculating a moving average for 601 rasters (720, 1440)and it is taking
 a day to finish. I wonder if this is normal or something is wrong
I am using Linux .

code:

        dir1 <- list.files("/home/spa4-358-4-365", "*.img", full.names =
TRUE)
        saf=stack(dir1)
        meansmosas <-  overlay(saf,fun=function(x) movingFun(x,
fun=mean,n=35, na.rm=TRUE))

info:

          saf
           class       : RasterStack
         dimensions  : 720, 1440, 1036800, 601  (nrow, ncol, ncell, nlayers)
       resolution  : 0.25, 0.25  (x, y)
       extent      : -180, 180, -90, 90  (xmin, xmax, ymin, ymax)
         coord. ref. : +proj=longlat +datum=WGS84 +no_defs +ellps=WGS84
+towgs84=0,0,0



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