Run results for: regex vs loop in keys

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Browser: Chrome 124

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
regex	389265.2 Ops/sec
loop	373624.5 Ops/sec

Script Preparation code:

var ids = {
    "report_": "1",
    "index_": 1,
    "format_": 1,
    "random_": 1,
    "user_": 1,
    "data_": 1,
    "task_": 1,
    "event_": 1,
    "log_": 1,
    "note_": 1,
    "message_": 1,
    "notification_": 1,
    "order_": 1,
    "product_": 1,
    "transaction_": 1,
    "payment_": 1,
    "invoice_": 1,
    "customer_": 1,
    "account_": 1,
    "profile_": 1
};

Tests:

regex
var keys = [ "report_add", "report_test", "index_1234", "index_random", "format_example", "format_test", "random_abc", "random_123", "user_admin", "user_guest", "data_entry", "data_output", "task_todo", "task_done", "event_start", "event_end", "log_error", "log_warning", "note_personal", "note_public" ]; function getPureKey(key) { if (!key) { return ''; } return key.replace(/_\w+/g, '_'); } keys.forEach(function(k) { const key = getPureKey(k); const contains = ids[key]; });
loop
var keys = [ "report_add", "report_test", "index_1234", "index_random", "format_example", "format_test", "random_abc", "random_123", "user_admin", "user_guest", "data_entry", "data_output", "task_todo", "task_done", "event_start", "event_end", "log_error", "log_warning", "note_personal", "note_public" ]; function isCollectionMemberKey(collectionKey, key) { return key.startsWith(collectionKey) && key.length > collectionKey.length; } keys.forEach(function(k) { let contains = false; for (const collectionKey in ids) { if (isCollectionMemberKey(collectionKey, k)) { contains = true; } } });