Composer Update : Allowed memory size of 1073741824 bytes exhausted

command line output

$ composer update --profile -vvv

Reading ./composer.json
Loading config file /Users/sushicodeur/.composer/config.json
Loading config file /Users/sushicodeur/.composer/auth.json
Loading config file ./composer.json
Checked CA file /usr/local/etc/openssl/cert.pem: valid
Executing command (/Users/sushicodeur/Workspace/php/myproject): git branch --no-color --no-abbrev -v
Failed to initialize global composer: Composer could not find the config file: /Users/sushicodeur/.composer/composer.json
To initialize a project, please create a composer.json file as described in the https://getcomposer.org/ "Getting Started" section
Reading /Users/sushicodeur/Workspace/php/myproject/vendor/composer/installed.json
Running 1.2.2 (2016-11-03 17:43:15) with PHP 5.6.27 on Darwin / 15.6.0
[9.6MB/0.00s] Loading composer repositories with package information
[10.0MB/0.01s] Downloading https://packagist.org/packages.json
[10.0MB/0.34s] Writing /Users/sushicodeur/.composer/cache/repo/https---packagist.org/packages.json into cache
[10.1MB/0.34s] Updating dependencies (including require-dev)
[10.1MB/0.36s] Reading /Users/sushicodeur/.composer/cache/repo/https---packagist.org/p-provider-2013.json from cache
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[73.6MB/1.01s] Downloading http://packagist.org/p/provider-latest%2485005b2a28ae88a3be8e33eb3c00f577a6a2bacca727cb175b7efdd6249bc06a.json
[79.3MB/1.75s] Writing /Users/sushicodeur/.composer/cache/repo/https---packagist.org/p-provider-latest.json into cache
[78.1MB/1.80s] Reading /Users/sushicodeur/.composer/cache/repo/https---packagist.org/provider-friendsofsymfony$user-bundle.json from cache
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Fatal error: Allowed memory size of 1073741824 bytes exhausted (tried to allocate 32 bytes) in phar:///usr/local/Cellar/composer/1.2.2/libexec/composer.phar/src/Composer/DependencyResolver/RuleWatchGraph.php on line 52

Check https://getcomposer.org/doc/articles/troubleshooting.md#memory-limit-errors for more info on how to handle out of memory errors.

composer.json

{
    "name": "sushicodeur/myproject",
    "license": "proprietary",
    "type": "project",
    "autoload": {
        "psr-4": {
            "": "src/"
        },
        "classmap": [
            "app/AppKernel.php",
            "app/AppCache.php"
        ]
    },
    "autoload-dev": {
        "psr-4": {
            "Tests\\": "tests/"
        }
    },
    "require": {
        "php": ">=5.5.9",
        "symfony/symfony": "3.0.*",
        "doctrine/orm": "^2.5",
        "doctrine/doctrine-bundle": "^1.6",
        "doctrine/doctrine-cache-bundle": "^1.2",
        "symfony/swiftmailer-bundle": "^2.3",
        "symfony/monolog-bundle": "^2.8",
        "sensio/distribution-bundle": "^5.0",
        "sensio/framework-extra-bundle": "^3.0.2",
        "incenteev/composer-parameter-handler": "^2.0",
        "friendsofsymfony/user-bundle": "~2.0@dev",
        "sonata-project/admin-bundle": "3.0.*",
        "sonata-project/doctrine-orm-admin-bundle": "3.0.*",
        "stof/doctrine-extensions-bundle": "^1.2",
        "twig/extensions": "1.0.*@dev",
        "creof/doctrine2-spatial": "~1"
    },
    "require-dev": {
        "sensio/generator-bundle": "^3.0",
        "symfony/phpunit-bridge": "^3.0"
    },
    "scripts": {
        "post-install-cmd": [
            "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::prepareDeploymentTarget"
        ],
        "post-update-cmd": [
            "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::prepareDeploymentTarget"
        ]
    },
    "extra": {
        "symfony-app-dir": "app",
        "symfony-bin-dir": "bin",
        "symfony-var-dir": "var",
        "symfony-web-dir": "web",
        "symfony-tests-dir": "tests",
        "symfony-assets-install": "relative",
        "incenteev-parameters": {
            "file": "app/config/parameters.yml"
        }
    }
}