if (FALSE) {
l <- sapply(1:20000, function(x) list(rnorm(1000)))
head(sapply_pb(l, mean))
# performance comparison
l <- sapply(1:20000, function(x) list(rnorm(1000)))
system.time(sapply(l, mean))
system.time(sapply_pb(l, mean))
}
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