deerelResearch's Recent Projects

Colour touching colour discrepancy

This project shows discrepancy between :color x is touching y" in Scratch vs. online Java player (v31).

Switch to costume discrepancy!

This project shows how switch to costume differs in behaviour between Scratch (1.2.1) and online version. Obvious workaround is using explicit round block (since online v31 does floor instead of round).

Colour calibrating dot

This project shows the solution of how to overcome the colour discrepancy between Scratch and online player, though, in every place in your code where you set/change colour effect your should use the full circle of Calibrating dot. But better than no workaround.

Colour effect discrepancy

This project shows how color effect has different semantics inside Scratch and in online Java player, at least in v31.

Touching vs. arithmetic benchmark

Graph of time taken 2

Second version uses if not ... stop script amd pm;y uses 4 copies of sets instead of 8

Graph of time taken

Is the when I receive script delayed?

Test if then when I receive block is delayed, that is, if the 2nd broadcast in the loop gets to run before the first when I receive handler (in Scratch 1.2.1 it is true, the variables are 112122 and 11212, respectively). Correct behaviour is for the first vvriable to be 121212, in my opinion.

Cat benchamrk, if structure and heap/tree

Broadcast and wait infrastructure cost

This project measures how much is brodcast and wait slower due to empty steps.

Complex expressions vs. variables another benchmark

Complex expressions vs. variables for subexpressions benchmark

Stamp vs. sprite benchmark

This benchmarks painting behaviour on 240 sprites (tries it down 50 times while measuring time taken) then writes fps. Each run is precede by one "clear". "Stamping" is "next costume, stamp" with hidden sprites. "Being" is "next costume" with shown sprites. "Showing" is "next costume, show" with shown sprites.

Broadcast - receive benchmark over 2172 scripts

Broadcast - receive benchmark over 972 scripts