Script to speed up Magento 2 indexer execution

async-reindex-m2.sh

#!/bin/bash
#Author: Nemanja Djuric
#Script to speed up Magento 2 indexer execution. NOTE: Ajust PHP name, if necessarry.

if [[ -e app/etc/env.php ]]; then

echo "Getting the list of indexers for this Magento installation."
indexlist=$(php bin/magento indexer:info | awk {'print $1'})
echo ${indexlist}

echo "Getting the number of indexers for this Magento installation."
indexcount=$(php bin/magento indexer:info | awk {'print $1'} | wc -l)
echo ${indexcount}

echo "Invalidating indexers, preparing for fresh start."
indexreset=$(php bin/magento indexer:reset)
echo ${indexreset}

for i in $(seq $indexcount); do
#magic starts here...
indexer_used=$(php bin/magento indexer:info | awk {'print $1'} | sed -n "$i"p)
echo "$(whereis n98-magerun2 | awk -F ":" '{print $2'}) indexer:reindex $indexer_used && rm -f $(pwd -P)/count$i.sh" > $(pwd -P)/count$i.sh ;
chmod a+rwx $(pwd -P)/count$i.sh; 
screen -d -m -S count$i $(pwd -P)/count$i.sh ; done

else

echo "please cd into installation directory"

fi