Fig. 1
From: Ultrafast and accurate 16S rRNA microbial community analysis using Kraken 2
Build and classification statistics. a Required time to build each database for Kraken/Bracken and QIIME. Kraken and Bracken allow for multi-threading while QIIME 2’s q2-feature-classifier is single-threaded. b Average classification runtime in minutes for each database. Kraken/Bracken combined runtime is reported for only 1 thread as all runtimes are < 1 min and bars are too small to be visible at this scale. QIIME was only run using 16 and 8 threads for SILVA. c Classification runtime for Kraken and Bracken in seconds for all multi-threading options. d Computational memory usage (RAM) for QIIME and Kraken/Bracken, shown in gigabytes (Gb). Kraken/Bracken RAM requirements reported only for 1 thread as Kraken and Bracken require < 0.5Gb of RAM regardless of thread count. e Computational memory usage (RAM) for Kraken/Bracken shown in megabytes (Mb)