Optionally skip JSON schema validation after serialization (#693)

* Optionally skip JSON schema validation after serialization

* Improving docstring description

* Relax precision in UT

pulser-core/pulser/json/abstract_repr/serializer.py

@@ -104,6 +104,7 @@ def serialize_abstract_sequence(
     seq: Sequence,
     seq_name: str = "pulser-exported",
     json_dumps_options: dict[str, Any] = {},
+    skip_validation: bool = False,
     **defaults: Any,
 ) -> str:
     """Serializes the Sequence into an abstract JSON object.
@@ -114,6 +115,13 @@ def serialize_abstract_sequence(
         json_dumps_options: A mapping between optional parameters of
             ``json.dumps()`` (as string) and their value (parameter cannot
             be "cls").
+        skip_validation: Whether to skip the validation of the serialized
+            sequence against the abstract representation's JSON schema.
+            Skipping the validation is useful to cut down on execution
+            time, as this step takes significantly longer than the
+            serialization itself; it is also low risk, as the validation
+            is only defensively checking that there are no bugs in the
+            serialized sequence.
         defaults: The default values for all the variables declared in this
             Sequence instance, indexed by the name given upon declaration.
             Check ``Sequence.declared_variables`` to see all the variables.
@@ -381,5 +389,6 @@ def remove_kwarg_if_default(
     abstr_seq_str = json.dumps(
         res, cls=AbstractReprEncoder, **json_dumps_options
     )
-    validate_abstract_repr(abstr_seq_str, "sequence")
+    if not skip_validation:
+        validate_abstract_repr(abstr_seq_str, "sequence")
     return abstr_seq_str

pulser-core/pulser/sequence/sequence.py

@@ -1747,6 +1747,7 @@ def to_abstract_repr(
         self,
         seq_name: str = "pulser-exported",
         json_dumps_options: dict[str, Any] = {},
+        skip_validation: bool = False,
         **defaults: Any,
     ) -> str:
         """Serializes the Sequence into an abstract JSON object.
@@ -1757,6 +1758,13 @@ def to_abstract_repr(
             json_dumps_options: A mapping between optional parameters of
                 ``json.dumps()`` (as string) and their value (parameter cannot
                 be "cls").
+            skip_validation: Whether to skip the validation of the serialized
+                sequence against the abstract representation's JSON schema.
+                Skipping the validation is useful to cut down on execution
+                time, as this step takes significantly longer than the
+                serialization itself; it is also low risk, as the validation
+                is only defensively checking that there are no bugs in the
+                serialized sequence.
             defaults: The default values for all the variables declared in this
                 Sequence instance, indexed by the name given upon declaration.
                 Check ``Sequence.declared_variables`` to see all the variables.
@@ -1772,7 +1780,11 @@ def to_abstract_repr(
         """
         try:
             return serialize_abstract_sequence(
-                self, seq_name, json_dumps_options, **defaults
+                self,
+                seq_name=seq_name,
+                json_dumps_options=json_dumps_options,
+                skip_validation=skip_validation,
+                **defaults,
             )
         except jsonschema.exceptions.ValidationError as e:
             if self.is_parametrized():

tests/test_abstract_repr.py

@@ -1155,6 +1155,17 @@ def test_numpy_types(self):
             == "abc"
         )
 
+    @pytest.mark.parametrize("skip_validation", [False, True])
+    def test_skip_validation(self, sequence, skip_validation):
+        with patch(
+            "pulser.json.abstract_repr.serializer.validate_abstract_repr"
+        ) as mock:
+            sequence.to_abstract_repr(skip_validation=skip_validation)
+            if skip_validation:
+                mock.assert_not_called()
+            else:
+                mock.assert_called_once()
+
 
 def _get_serialized_seq(
     operations: list[dict] = [],

tests/test_sequence_sampler.py

@@ -24,7 +24,7 @@
 import pulser_simulation
 from pulser.channels.dmm import DMM
 from pulser.devices import Device, MockDevice
-from pulser.pulse import Pulse
+from pulser.pulse import PHASE_PRECISION, Pulse
 from pulser.register.mappable_reg import MappableRegister
 from pulser.register.register_layout import RegisterLayout
 from pulser.sampler import sample
@@ -480,7 +480,7 @@ def test_phase_modulation(off_center):
     np.testing.assert_allclose(
         seq_samples.phase_modulation + 2 * np.pi * off_center,
         full_phase.samples,
-        atol=1e-15,
+        atol=PHASE_PRECISION,
     )