Allowed memory size of 1610612736 bytes exhausted (tried to allocate 4096 bytes) in phar: code example

Example 1: Allowed memory size of 1610612736 bytes exhausted

export COMPOSER_MEMORY_LIMIT=-1

Example 2: Fatal error: Allowed memory size of 1610612736 bytes exhausted

Fatal error: Allowed memory size of 1610612736 bytes exhausted

export COMPOSER_MEMORY_LIMIT=-1
and restart composer update

Example 3: Fatal error: Allowed memory size of 1610612736 bytes exhausted (tried to allocate 32 bytes) in

;memory_limit=512M