# \[Solved\] Is there some reason why my blocks might start to lag?

**URL:** <https://community.thunkable.com/t/solved-is-there-some-reason-why-my-blocks-might-start-to-lag/55876>\
**Category:** Questions about Thunkable X\
**Tags:** solved\
**Created:** [November 10, 2018, 5:39pm UTC](https://community.thunkable.com/t/solved-is-there-some-reason-why-my-blocks-might-start-to-lag/55876 "2018-11-10T17:39:17Z")\
**Posts on this page:** 1\
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**Author:** ![User81](https://avatars.discourse-cdn.com/v4/letter/u/ba9def/32.png) [@User81](https://community.thunkable.com/u/User81)\
**Post date:** [November 12, 2018, 5:38pm UTC](https://community.thunkable.com/t/solved-is-there-some-reason-why-my-blocks-might-start-to-lag/55876/8 "2018-11-12T17:38:46Z")

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Hey Alex and Paul,

thank you @actech for pointing out the relation to WIFI. I can confirm that. That lead me to further testing with the result, that **the compiling time is equivalent to the WIFI upload time**

@paulmw: This might be interesting for you (if you did not know yet 🙂 )

I checked two projects with different number of blocks and made 3 times a little dragging on a WHEN-block in the block-section:

my large project with 700 blocks: obeyed compilation time about 13 seconds

 ![compilation_speed1](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/e/2/e2f134f9817b318c9ff413ea5a4ec952456d9c2e.png) !

small project with 20 blocks: nearly no compilation time

 ![compilation_speed2](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/f/b/fb37e363ce0db90513076b71d08ebfd6be910427.png) !

You cannot use the total received and total sent values, because I listened to spotify while thunking. But if you look at the sent curve it says for the large project a total of ~2 MB (area under the curve: 200 kB/s \* 10 s) is sent via WIFI on each slight change!

My calculations are: if my WIFI / DSL connection is limited to 2 Mbits/s, it takes 10 s for 700 blocks.

→ Each Mbit/s speed of your DSL connection lets you compile 35 blocks in one second.

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