Simulations of a globular cluster: comparison of Tree and direct N-body codes. Evolution of the bound mass (top panel) and the 90%, 50% and 1% Lagrangian radii (top to bottom, bottom panel) of a simulated star cluster subject to a galactic tidal field extracted from a cosmological simulation (model A12-2 from Rieder et al. 2012). The cluster was simulated with the GPU treecode Bonsai (red, solid curves) and Hermite direct N-body code ph4 (blue, dashed curve). From Rieder et al. (2012).