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Fig. 1 | BMC Bioinformatics

Fig. 1

From: Aird: a computation-oriented mass spectrometry data format enables a higher compression ratio and less decoding time

Fig. 1

A Traditional mzXML-like indexing, MS data is sorted by retention time. The retention time and spectrum start position are stored as an index. B In DDA, each MS1 spectrum is followed by 0-N MS2 data. Extracted ion chromatogram is generally calculated in successive MS1 data, so reordering MS1 data to put them in the same physical file block can speed up file reads. C Typically used in SWATH/DIA, every MS2 data belongs to a particular m/z SWATH window. MS2 data in the same window will be frequently accessed and calculated. Reordering is essential for fast file I/O

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