The Tile Calorimeter (TileCal) is a sampling hadronic calorimeter covering the central region of
the ATLAS experiment, with steel as absorber and plastic scintillators as active medium. The
scintillators are read out by wavelength shifting fibres coupled to the photomultiplier tubes (PMTs). The analogue signals from the PMTs are amplified, shaped and digitised by sampling the signal every 25 ns and stored on the detector until a trigger decision is received. The TileCal front-end electronics reads out the signals produced by about 10000 channels measuring energies ranging from about 30 MeV to about 2 TeV. Each stage of the signal production from scintillation light to the signal reconstruction is monitored and calibrated. The calorimeter time resolution has been studied with multi-jet events. High-momentum isolated muons have been used to study and validate the electromagnetic scale, while hadronic response has been probed with isolated hadrons. This document presents recent performance results, including calibration and optics robustness.