This is nothing we can predict, it depends on your program and your settings for the PSoC.
Waiting for data ready -using an interrupt or polling- reading the data from the filter and doing what you want to the data takes a number of clock cycles. These even depend on the optimization level your program was compiled with. ADC sampling faster than these clock cycles take will lead to gaps in the data stream. When sampling faster than 50kHz you should consider using DMA which, when running, is like a fire-and -forget-it running in background. There are some app nottes and examples using DMA.