Senate GOP leaders are weighing accelerating the pace of the trial, eyeing a schedule that would maintain the same overall number of hours for opening arguments and senatorial questions as employed in Clinton’s case, but spreading it out over fewer days, according to six people familiar with internal deliberations.

If each side used all its debate time, that could mean fewer calendar days for the trial and a faster verdict. Clinton’s trial ran for five weeks, with opening arguments starting a week after it formally began. Trump's could be far shorter.

In their partisan opening resolution, Republicans are considering providing 24 hours of opening arguments to both the House impeachment managers and the White House counsel. If each team wants to use the full amount of hours, they may have to do so over as few as two days, potentially leading to long trial days.

The current "posture is two, 12-hour periods. Quite honestly, I don't believe that the White House would consume the 24 hours nor do I think based on the evidence if we read the evidence word for word from the House it would take 24 hours," said Sen. Thom Tillis (R-N.C.) on Friday.

https://www.politico.com/news/2020/01/17/senate-impeachment-trial-schedule-100536