Fastest Array Replication

[NimbleThink]

I have need to replicate elements in an array.

The "Interleave 1D Arrays" is not feasible due to:

1) too large a number of replicates (>5)

2) variable number of replicates (345, 625, etc.)

I know that a For loop (with a pre-initialized array of size length M x number of replicates N) could work, however I avoid them (for speed) and so came up with the following:

Multiply the input array with an array populated with the number of replicates using the Outer Product then reshape from a 2D array back to a 1D array.

Any other suggestions?