  Code search engines usually use readability feature to rank code snippets.
There are several metrics to calculate this feature, but developers may have
different perceptions about readability. Correlation between readability and
understandability features has already been proposed, i.e., developers need to
read and comprehend the code snippet syntax, but also understand the semantics.
This work investigate scores for understandability and readability features,
under the perspective of the possible subjective perception of code snippet
comprehension. We find that code snippets with higher readability score has
better comprehension than lower ones. The understandability score presents
better comprehension in specific situations, e.g. nested loops or if-else
chains. The developers also mentioned writability aspects as the principal
characteristic to evaluate code snippets comprehension. These results provide
insights for future works in code comprehension score optimization.
