Allowed memory size of 1073741824 bytes exhausted at code example

Example 1: Allowed memory size of 1610612736 bytes exhausted

export COMPOSER_MEMORY_LIMIT=-1

Example 2: PHP Fatal error: Allowed memory size of 1610612736 bytes exhausted (tried to allocate 4096 bytes)

php -d memory_limit=-1 /usr/local/bin/composer install