Minecraft shader (1.15 best) for slow PCs?

Hi. I wanted to ask if anyone knows a Minecraft shader (best for 1.15) for slow PCs.

So I would recommend optifine just download and then you can choose shader and also download

My favorite shader is the Sildur Vibrant. But I do not know if it is also for less powerful devices…

With most shaders you can "worsen" everything in the shader settings.

Example: With the BSL shader you can switch between "Low", "Medium", "High", "Ultra" and "Custom" in the shader settings for the profile.