Improving reliability of threaded rendering, separating JS Utils into separate files.

runtime-pyside6/LogarithmPlotter/logarithmplotter.py

@@ -21,9 +21,10 @@ from platform import system as os_name, release as OS_RELEASE
 from sys import path as sys_path
 from sys import argv, exit
 from tempfile import TemporaryDirectory
+from math import ceil
 from time import time
 
-from PySide6.QtCore import QTranslator, QLocale
+from PySide6.QtCore import QTranslator, QLocale, QThreadPool, QThread
 from PySide6.QtGui import QIcon
 from PySide6.QtQml import QQmlApplicationEngine
 from PySide6.QtQuickControls2 import QQuickStyle
@@ -162,7 +163,11 @@ def run():
 
     dep_time = time()
     print("Loaded dependencies in " + str((dep_time - start_time) * 1000) + "ms.")
-
+    
+    # Maxing thread count to half the computer's thread count to avoid maxing CPU
+    # with too many threads (and also leaving some for rendering).
+    QThreadPool.globalInstance().setMaxThreadCount(int(ceil(QThread.idealThreadCount() / 2)))
+    
     register_icon_directories()
     app = create_qapp()
     translator = install_translation(app)

runtime-pyside6/LogarithmPlotter/util/promise.py

@@ -22,6 +22,8 @@ from PySide6.QtQml import QJSValue
 
 from LogarithmPlotter.util.js import PyJSValue
 
+NO_RETURN = [None, QJSValue.SpecialValue.UndefinedValue]
+
 
 def check_callable(function: Callable|QJSValue) -> Callable|None:
     """
@@ -153,13 +155,12 @@ class PyPromise(QObject):
     @Slot(QObject)
     def _fulfill(self, data):
         self._state = "fulfilled"
-        no_return = [None, QJSValue.SpecialValue.UndefinedValue]
         print("Finished", self._runner.args)
         for i in range(len(self._fulfills)):
             try:
                 result = self._fulfills[i](data)
                 result = result.qjs_value if isinstance(result, PyJSValue) else result
-                data = result if result not in no_return else data  # Forward data.
+                data = result if result not in NO_RETURN else data  # Forward data.
             except Exception as e:
                 self._reject(repr(e), start_at=i)
                 break
@@ -168,8 +169,7 @@ class PyPromise(QObject):
     @Slot(str)
     def _reject(self, error, start_at=0):
         self._state = "rejected"
-        no_return = [None, QJSValue.SpecialValue.UndefinedValue]
         for i in range(start_at, len(self._rejects)):
             result = self._rejects[i](error)
             result = result.qjs_value if isinstance(result, PyJSValue) else result
-            error = result if result not in no_return else error  # Forward data.
+            error = result if result not in NO_RETURN else error  # Forward data.