Hello. I'm working on a Great Lakes shipping simulator, but in development, I faced a major lag issue. I tried different ways to optimize the code, but I'm not too experienced at optimizing code. If anyone can help fix the lag issue, I would appreciate it. Thanks.

Project:
https://scratch.mit.edu/projects/1268717795/

its not that laggy for me…

I see a lot of

(item # of [] in [list v])
<[ v] contains [thing] ?>

blocks, both of which are really laggy, especially on longer lists, because they go through the whole list searching for an item. Often it's better to have slightly longer lists where you can use a simple mathematical formula to get the right item number without needing to do a ton of pointless checks.

<touching color [#1b37da] ?>

Is also very heavy, as it checks a bunch of colours on every pixel the sprite touches and can be avoided with some maths or with

<touching [ v] ?>

How would i find an alternative for

<touching color [#1b37da] ?>

if the zones are all in real player sprite?
(this project is my first attempt at using lists, and one of those open/scrolling maps)

31undtim wrote:

How would i find an alternative for

<touching color [#1b37da] ?>

if the zones are all in real player sprite?
(this project is my first attempt at using lists, and one of those open/scrolling maps)

with maths is probably your best bet then. There's plenty of articles on the internet discussing the ways to calculate hitboxes,

dem_bot wrote:

I see a lot of

(item # of [] in [list v])
<[ v] contains [thing] ?>

blocks, both of which are really laggy, especially on longer lists, because they go through the whole list searching for an item. Often it's better to have slightly longer lists where you can use a simple mathematical formula to get the right item number without needing to do a ton of pointless checks.

Wait, really? The underlying code doesn't optimize at all?

dem_bot wrote:

I see a lot of

(item # of [] in [list v])
<[ v] contains [thing] ?>

blocks, both of which are really laggy, especially on longer lists, because they go through the whole list searching for an item. Often it's better to have slightly longer lists where you can use a simple mathematical formula to get the right item number without needing to do a ton of pointless checks.

I couldn't find

(item # of [] in [list v])

in my code, because I might have replaced them before posting the topic. I'm assuming you meant

(item ( v) of [list v] :: list)

If so, should I replace

if <[ v] contains (item ( (answer)) of [list v] :: list) ?> then

end

lines with

if <(answer) = [1]> then

end

instead?

Also, sorry for forgetting to say that the lag in the project happens outside the editor too. I'm not sure if it's a device issue or an issue with my code in general. I've made a copy where I removed every list, which slightly reduced the lag, but the problem was still there. I believe the underlined issue is maybe how I coded the lists and a few other stuff

Use Turbowarp

ericyoel wrote:

Use Turbowarp

Turbowarp is blocked in almost every school, and not really helpful when i want to find a way to optimize my project better