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attributes: avoid g_strdup in cogl_attribute_new
Calling g_strdup for attribute names was starting to show up in profiles due to calling malloc for new string storage so frequently. This avoids calling g_strdup and calls g_intern_string() instead. For the really common case names we even avoid the cost of g_intern_string since we can trivially relate our internal name_id to a static string. Reviewed-by: Neil Roberts <neil@linux.intel.com>
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@ -45,7 +45,7 @@ struct _CoglAttribute
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CoglObject _parent;
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CoglAttributeBuffer *attribute_buffer;
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char *name;
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const char *name;
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CoglAttributeNameID name_id;
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gsize stride;
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gsize offset;
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@ -205,7 +205,6 @@ cogl_attribute_new (CoglAttributeBuffer *attribute_buffer,
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gboolean status;
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attribute->attribute_buffer = cogl_object_ref (attribute_buffer);
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attribute->name = g_strdup (name);
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attribute->stride = stride;
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attribute->offset = offset;
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attribute->n_components = n_components;
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@ -213,11 +212,46 @@ cogl_attribute_new (CoglAttributeBuffer *attribute_buffer,
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attribute->immutable_ref = 0;
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if (strncmp (name, "cogl_", 5) == 0)
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status = validate_cogl_attribute (attribute->name,
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n_components,
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&attribute->name_id,
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&attribute->normalized,
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&attribute->texture_unit);
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{
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const char *common_tex_coord_names[8] = {
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"cogl_tex_coord0_in",
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"cogl_tex_coord1_in",
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"cogl_tex_coord2_in",
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"cogl_tex_coord3_in",
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"cogl_tex_coord4_in",
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"cogl_tex_coord5_in",
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"cogl_tex_coord6_in",
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"cogl_tex_coord7_in"
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};
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status = validate_cogl_attribute (name,
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n_components,
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&attribute->name_id,
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&attribute->normalized,
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&attribute->texture_unit);
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/* Avoid even the cost of g_intern_string() for the very common case
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* attribute names...*/
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switch (attribute->name_id)
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{
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case COGL_ATTRIBUTE_NAME_ID_POSITION_ARRAY:
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attribute->name = "cogl_position_in";
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break;
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case COGL_ATTRIBUTE_NAME_ID_COLOR_ARRAY:
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attribute->name = "cogl_color_in";
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break;
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case COGL_ATTRIBUTE_NAME_ID_TEXTURE_COORD_ARRAY:
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if (attribute->texture_unit < 8)
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attribute->name = common_tex_coord_names[attribute->texture_unit];
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else
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attribute->name = g_intern_string (name);
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break;
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case COGL_ATTRIBUTE_NAME_ID_NORMAL_ARRAY:
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attribute->name = "cogl_normal_in";
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break;
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default:
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g_warn_if_reached ();
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}
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}
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#if 0
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else if (strncmp (name, "gl_", 3) == 0)
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status = validate_gl_attribute (attribute->name,
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@ -228,6 +262,7 @@ cogl_attribute_new (CoglAttributeBuffer *attribute_buffer,
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#endif
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else
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{
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attribute->name = g_intern_string (name);
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attribute->name_id = COGL_ATTRIBUTE_NAME_ID_CUSTOM_ARRAY;
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attribute->normalized = FALSE;
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attribute->texture_unit = 0;
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@ -321,7 +356,6 @@ _cogl_attribute_immutable_unref (CoglAttribute *attribute)
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static void
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_cogl_attribute_free (CoglAttribute *attribute)
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{
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g_free (attribute->name);
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cogl_object_unref (attribute->attribute_buffer);
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g_slice_free (CoglAttribute, attribute);
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