Simplest way to create terrain shadowmap on forest scene

One last thing, using that “all over the map shadow” I see a significant drop in fps, can you confirm this is expected and if I may be missing an obvious optimization?

Going from something like 220 fps to 20 on a config with a GeForce GTX 480/PCIe/SSE2

Trying with a split of 1, texture size of 1024

Stats are
Textures (M) = 10
Textures (F) = 10
Textures(S) = 267

Shaders (M) = 7
Shaders (F) = 7
Shaders (S) = 265

Objects = 1189
Uniforms = 2574
Triangles = 1,140,807
Vertices = 1,876,897

I’ve searched the forum for similar posts but only found that topic related to SSAO

https://hub.jmonkeyengine.org/t/solved-ambient-shadow-filter-drops-my-fps-a-lot/35181/19

Code is

    plsr = new DirectionalLightShadowRenderer(assetManager, 1024,1);
    plsr.setLight(lightTest);
    viewPort.addProcessor(plsr);       
    plsr.setEdgeFilteringMode(EdgeFilteringMode.PCF4);
    plsr.setShadowIntensity(0.8f);
    plsr.setLambda(0.8f);

Thanks