Algorithm 2: PCCGWO pseudo-code.
Master process
1.	Randomly initialize the grey wolf population.
2.	Decompose the population into $m$ sub-swarms denoted as ${\mathcal{S}}_1,{\mathcal{S}}_2,\dots ,{\mathcal{S}}_m$.
3.	Initialize the buffer $\mathit{C}$ using randomly selected individuals from each sub-swarm.
4.	Send each sub-swarm to a slave.
5.	Cycle = 0
6.	While termination criteria = false do
7.	Parallel for $j=1:m$ slaves
8.	Send to slaves the buffer vector $\mathit{C}$ defined in Equation (14).
9.	Waiting for slaves.
10.	Receive all representatives of sub-swarms from slaves.
11.	End Parallel for
12.	Update the buffer vector $\mathit{C}$.
13.	Cycle = Cycle + 1
14.	End While
Slave [j] process
15.	While true do
16.	Receive the buffer vector $\mathit{C}$ from Master process.
17.	Execute GWO on sub-swarm ${\mathcal{S}}_j$.
18.	Send the representative of sub-swarm ${\mathcal{S}}_j$ to Master process.
19.	End While