Zero Allocation TMP_Text

[merry quarry]

I use ZString to non GC alloc for string, however the TMP_SetText is still exist on Resize Array or something.

[gentle axle]

I imagine TMP has to manage an internal buffer to hold the data you pass to it. Does it allocate on every call?

[merry quarry]

yes

[gentle axle]

On the same instance with data that is either the same size or smaller?

[merry quarry]

will check tomorrow

[merry quarry]

I ran it per frame, and it was the same string

using SetCharArray

What's the point of using char array if its going to be changed to string in the internal

 private string InternalTextBackingArrayToString()
 {
     char[] array = new char[m_TextBackingArray.Count];
     for (int i = 0; i < m_TextBackingArray.Capacity; i++)
     {
         char c = (char)m_TextBackingArray[i];
         if (c == '\0')
         {
             break;
         }

         array[i] = c;
     }

     m_IsTextBackingStringDirty = false;
     return new string(array);
 }

[gentle axle]

Seems to be one of those editor only things https://github.com/needle-mirror/com.unity.textmeshpro/blob/75fef8b868509a5496d5d67bd912153a3aa149cc/Scripts/Runtime/TMP_Text.cs#L2783

[merry quarry]

wasnt there a feature where we can highlight the profiler to be [Editor Only] like that

[gentle axle]

Sounds familiar, but I don't remember any details.

[merry quarry]

and AFAIK the feature is internal to the engine. its usually popup when we use GetComponent<T> but returns null

[weak knot]

Hi! I can confirm that TMP_Text does indeed allocate and we don't have a way to avoid that at this time. We might implement a refactor that will address this issue, but cannot say when that will be.

[merry quarry]

do you have any insights, maybe I can do it manually?

and is 100% only in editor?

[merry quarry]

 // Make sure array size is appropriate
            if (length >= m_TextBackingArray.Capacity)
                m_TextBackingArray.Resize((length));

If only there's a way to preAllocate