test: bound the warm run after a project-wide rewrite separately

Author: kvlonge

tests/e2e/src/sqlbuild/cli/commands/main/compile/test_fresh_process_compile_cache_performance.py

@@ -26,6 +26,9 @@
 _GIB: int = 1024 * 1024 * 1024
 _MIB: int = 1024 * 1024
 _MAX_WARM_TO_COLD_RATIO: float = 0.70
+# The warm run after a project-wide rewrite re-reads every unchanged artifact to compare it; under
+# the CI memory cap those files have already left the page cache, so it reads them back from disk.
+_MAX_AFTER_PROJECT_REWRITE_TO_COLD_RATIO: float = 0.8
 _MAX_EDIT_TO_COLD_RATIO: float = 0.70
 # Writing the cache during a cold compile must stay a small same-runner cost over --no-cache.
 _MAX_CACHE_WRITE_CPU_OVERHEAD_RATIO: float = 1.10
@@ -210,10 +213,15 @@ def test_given_semantic_project_when_compiling_across_processes_then_cache_is_in
         result.after_project_config_edit,
     ):
         assert measurement.elapsed_seconds < test_case.expected_warm_max_wall_seconds
+    for measurement in (result.warm, result.after_leaf_edit, result.after_macro_edit):
         assert (
             measurement.elapsed_seconds / result.cold.elapsed_seconds
             <= test_case.expected_max_warm_to_cold_ratio
         )
+    assert (
+        result.after_project_config_edit.elapsed_seconds / result.cold.elapsed_seconds
+        <= _MAX_AFTER_PROJECT_REWRITE_TO_COLD_RATIO
+    )
     for measurement in (result.leaf_edit, result.macro_edit):
         assert measurement.elapsed_seconds < test_case.expected_edit_max_wall_seconds
         assert (