Given the lengthy time required to launch a parpool, I have considered just launching one at the start of every MATLAB session and setting the IdleTimeout parameter to Inf to force the pool to remain open for the entire session. What would be the downside of doing this while the pool isn't being actively used? Is there a performance penalty on serial code when a pool is left open in the background?
MATLAB: Disadvantages of leaving parpool open
idletimeoutParallel Computing Toolboxparpool
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