Imam al-‘Asr ‘Allamah Anwar Shah Kashmiri related: 

‘‘I had already studied ‘Umdat al-Qari[i] a year prior to commencing [the study of] Sahih al-Bukhari under the tutelage of the Shaykh of the era Mawlana Mahmud al-Hasan (may Allah sanctify his secret).  I studied Fath al-Bari[ii] during the year we were taught [Sahih] al-Bukhari.’’ 

Mawlana Mashiyyat Allah Bijnori would relate that ‘‘he (‘Allamah Kashmiri) would also study [Imam] Qastallani’s Irshad al-Sari[iii] that same year. He himself would say, ‘the pace of my reading was so quick that I would read two hundred pages [at a time][iv].’ ’’ 

Anwar-e-Anwari, p.128 (Karachi: Jameah Arabia Ahsan-ul-Uloom, Rabi‘ al-Thani 1425 ed.) by Mawlana Muhammad Anwari (student of Imam al-‘Asr)

[i] Imam Badr al-Din al-‘Ayni al-Hanafi’s commentary of Sahih al-Bukhari

[ii] Imam Ibn Hajar al-‘Asqalani’s commentary of Sahih al-Bukhari

[iii] Imam Shihab al-Din al-Qastallani’s commentary of Sahih al-Bukhari

[iv] This has also been highlighted by the esteemed ‘Allamah’s late son, Mawlana Anzar Shah Kashmiri, who relates that his father studied Imam Ibn al-Humam’s Fath al-Qadir, published in eight volumes and comprising thousands of pages, in twenty days. He did not study it again during his lifetime. Despite this, it is well known that he would be able to quote lengthy passages from it, verbatim, decades later. He also studied the Musnad of Imam Ahmad ibn Hanbal, reading an average of two hundred pages daily.  Despite this rapid pace, he would read with concentration, contemplation and comprehension, deriving evidences in favour of the Hanafi School as he studied. (see Naqsh-e-Dawam (Deoband: Bayt al-Hikmat, 1996 ed.)) 

May Allah shower His mercy upon all the honourable ‘ulama’ mentioned above. Amin.