PY-72210 DataView: improve speed of get_value_occurrences_count

1. Split additional computation for statistics and computation for visualizations
2. Computation for visualization is now called only by request

GitOrigin-RevId: d872fbd9ed5732633814228713acc734ee2043e5

python/helpers/pydev/_pydevd_bundle/pydevd_tables.py

@@ -10,6 +10,7 @@ class TableCommandType:
     DF_INFO = "DF_INFO"
     SLICE = "SLICE"
     DESCRIBE = "DF_DESCRIBE"
+    HISTOGRAM_DATA = "HISTOGRAM_DATA"
 
 
 def is_error_on_eval(val):
@@ -49,10 +50,11 @@ def exec_table_command(init_command, command_type, start_index, end_index, f_glo
         res.append(NEXT_VALUE_SEPARATOR)
         res.append(table_provider.get_value_counts(table))
         res.append(NEXT_VALUE_SEPARATOR)
+
+    elif command_type == TableCommandType.HISTOGRAM_DATA:
         res.append(table_provider.get_value_occurrences_count(table))
         res.append(NEXT_VALUE_SEPARATOR)
 
-
     elif command_type == TableCommandType.SLICE:
         res.append(table_provider.get_data(table, start_index, end_index))
 

python/pydevSrc/src/com/jetbrains/python/tables/TableCommandType.kt

@@ -4,5 +4,8 @@ import com.intellij.openapi.util.IntellijInternalApi
 
 @IntellijInternalApi
 enum class TableCommandType {
-  DF_INFO, SLICE, DF_DESCRIBE
+  DF_INFO,
+  SLICE,
+  DF_DESCRIBE,
+  VISUALIZATION_DATA
 }