Remove vm_hostvars variable
#61
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This seemingly innocent variable was responsible for enormous increases in CPU usage as each time it is referenced Ansible was expanding all the VM host variables. In particular, this expansion explosion was trigered whenever Ansible needed to resolve a guest host's connection strings (i.e. on every step!), and some of these variables include encrypted secrets that require calling `gpg` each time.
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This seemingly innocent variable was responsible for enormous increases in CPU usage as each time it is referenced Ansible was expanding all the VM host variables.
In particular, this expansion explosion was trigered whenever Ansible needed to resolve a guest host's connection strings (i.e. on every step!), and some of these variables include encrypted secrets that require calling
gpgeach time.