Sobject Description made easy

gistfile1.txt

String obj = 'PermissionSet'; 
SObjectType r = ((SObject)(Type.forName('Schema.'+obj).newInstance())).getSObjectType();
Map<String,Schema.SObjectField> fields = r.getDescribe().fields.getMap();
for(String field : fields.keyset()){
  Integer padding = 50 - field.length();
  system.debug(fields.get(field) + '-'.repeat(padding) + fields.get(field).getDescribe().getLabel());
}

you can also update the second line to: SObjectType r = Schema.getGlobalDescribe().get(obj);

Global describes are notoriously slow and this mechanism of describing an object is blazingly fast. Here's a good read on it.
https://salesforce.stackexchange.com/questions/218982/why-is-schema-describesobjectstypes-slower-than-schema-getglobaldescribe

That's fair - I wouldn't recommend using global describes in production-level code, typically (as I'm aware of the horrible performance); I thought this was just a helper method to be invoked on occasion in Anonymous Apex. If you're using globalDescribe to dynamically retrieve UI elements based on field names, or something, I definitely agree that it should be avoided like the plague due to the general slowness.