public static int suggestForkedCompilerHeapSize() {
    //final JpsProject project = context.getProjectDescriptor().getProject();
    //final JpsJavaCompilerConfiguration config = JpsJavaExtensionService.getInstance().getOrCreateCompilerConfiguration(project);
    //final JpsJavaCompilerOptions options = config.getCurrentCompilerOptions();
    //return options.MAXIMUM_HEAP_SIZE;
    if (FORKED_JAVAC_HEAP_SIZE_MB > 0) {
      return FORKED_JAVAC_HEAP_SIZE_MB;
    }
    final int maxMbytes = (int)(Runtime.getRuntime().maxMemory() / 1048576L);
    if (maxMbytes < 0 || maxMbytes > 1500) {
      return -1; // in the size is too big for older VMs or int overflow, return -1 to let VM choose the heap size
    }
    return Math.max(maxMbytes, 256); // per-forked process: minimum 256 Mb
  }
public static int suggestForkedCompilerHeapSize()