Experiment: Improve test coverage

In test_algebra_initialisation.py, remove 'too_slow_without_jit' and
'veryslow' marks, except for 'conformalize(Cl(3))' test. These test are
not that slow, esp. after numpy vectorized mv_mult() implementation.

This adds coverage over _get_mult_function.mv_mult(), as such is only
registered when function is not JIT-ed.

clifford/test/test_algebra_initialisation.py

@@ -2,23 +2,14 @@
 import pytest
 
 from clifford import Cl, conformalize, _powerset
-from clifford._numba_utils import DISABLE_JIT
 
 from . import rng  # noqa: F401
 
-too_slow_without_jit = pytest.mark.skipif(
-    DISABLE_JIT, reason="test is too slow without JIT"
-)
-
 
 class TestInitialisation:
 
     @pytest.mark.parametrize("n", [
-        x
-        for x in range(2, 7)
-    ] + [
-        pytest.param(x, marks=too_slow_without_jit)
-        for x in range(7, 9)
+        x for x in range(2, 9)
     ])
     def test_speed(self, n, benchmark):
         def generate_algebra():
@@ -35,11 +26,10 @@ def generate_algebra():
             layout.inv_func
         benchmark(generate_algebra)
 
-    @too_slow_without_jit
-    @pytest.mark.veryslow
     @pytest.mark.parametrize(
         'algebra',
-        [Cl(i) for i in [4]] + [conformalize(Cl(3)[0])],
+        [Cl(i) for i in [4]]
+        + [pytest.param(conformalize(Cl(3)[0]), marks=pytest.mark.veryslow)],
         ids=['Cl(4)', 'conformalize(Cl(3))']
     )
     def test_sparse_multiply(self, algebra, rng):  # noqa: F811