[Copilot]

Phaser CE 2.7+ issues more GL calls per draw than 2.6.2, which hurts frame rate on older mobile devices, especially with many Text objects. Profiling in the issue shows 8 calls per draw in 2.8 vs. 2 in 2.6.2, including two bindTexture calls.

This PR removes one of those two bindTexture calls. It does not remove the other, and it does not address the remaining extra calls per draw.

• WebGLSpriteBatch.renderBatch (src/pixi/renderers/webgl/utils/WebGLSpriteBatch.js)
  • The non-dirty path called gl.bindTexture on every draw.
  • With multi-texture batching enabled, render() and renderTilingSprite() have already bound each base texture to its unit and tracked it in PIXI.WebGLRenderer.textureArray, so the extra bind was redundant.
  • The bind now runs only when PIXI._enableMultiTextureToggle is false, where render() doesn't bind and renderBatch still has to.

// before
else
{
    gl.bindTexture(gl.TEXTURE_2D, texture._glTextures[gl.id]);
}

// after
else if (!PIXI._enableMultiTextureToggle)
{
    gl.bindTexture(gl.TEXTURE_2D, texture._glTextures[gl.id]);
}

Review notes

• Not yet tested or benchmarked, so the performance gain is unmeasured.
• The else branch bound the texture to whichever unit was last active, not to texture.textureIndex, so it was not reliably correct in multi-texture mode.
• The bind-on-switch logic in render() is unchanged.
• Worth checking against the repro from the issue and the 2.6.2 comparison pens.

• Fixes PhaserCE 2.7.X has performance issues compared to Phaser 2.6.2 #198

[Copilot]

🟡 Changes recommended

Filter passes leave the binding cache stale, so skipping the fallback bind can cause subsequent sprites to sample the wrong texture.

1 open issue

• Invalidate texture cache after popFilter to prevent stale unit-0 binding · New

What changed in this PR

This PR targets the WebGL rendering overhead reported in #198 by removing one texture bind per batch in multi-texture mode. Performance gains remain unmeasured.

Changes:

• Skip the clean-texture bind in renderBatch() when multi-texture batching is enabled.
• Preserve the bind in single-texture mode and leave dirty-texture uploads unchanged.

File	Description
src/​pixi/​renderers/​webgl/​utils/​WebGLSpriteBatch.js	Conditionally skips texture binding in multi-texture batches.

_{Review effort: Balanced}