Currently in BsonTemplateEvaluator there's no method to run a mongo-perf 'op' with a specific type (i.e. NumberInt). Adding a #NUMBER_INT macro to the BsonTemplateEvaluator code would allow something like the following:

op: "update",
multi: true,
query: {},
update: {
   $inc: {a: { "#NUMBER_INT": 1 } }
}

If we add #NUMBER_INT, we should also add #NUMBER_LONG, #NUMBER_DOUBLE, and #NUMBER_DECIMAL.

Although doubles are inserted automatically, in order to ensure performance between types has the same behavior, a #NUMBER_DOUBLE macro should be added.