VSEARCH 2.23.0

Update documentation. Add citation file. Modernize and improve code. Fix several minor bugs. Fix compilation with GCC 13. Print stats after fastq_mergepairs to log file instead of stderr. Handle sizein option correctly with dbmatched option for usearch_global. Allow maxseqlength option for makeudb_usearch. Fix memory allocation problem with chimera detection. Add lengthout and xlength options. Increase precision for eeout option. Add warning about sintax algorithm, random seed and multiple threads. Refactor chimera detection code. Add undocumented experimental long_chimeras_denovo command. Fix segfault with clustering. Add more references.

VSEARCH 2.22.1

Add the derep_smallmem command for dereplication with less memory usage. Remove compiler warnings.

VSEARCH 2.21.2

Fix problems with the --lcaout option.

VSEARCH 2.21.1

Fix dereplication with empty input file.

VSEARCH 2.21.0

This version adds the sample, qsegout and tsegout options. It also enables the use of UDB databases with uchime_ref.

VSEARCH 2.20.1

Fix hang in fastq_mergepairs with multiple threads.

VSEARCH 2.20.0

Added the fastx_uniques command and the fastq_qout_max option for dereplication of FASTQ files. Some code cleaning.

VSEARCH 2.19.0

Added the lcaout and lca_cutoff options to enable the output of last common ancestor (LCA) information about hits when searching. The randseed option was added as a valid option to the sintax command. Code improvements.

v2.18.0

Added the fasta2fastq command. Fixed search bug on ppc64le. Fixed bug with removal of size and ee info in uc files. Fixed compilation errors in some cases. Made some general code improvements. Updated manual.

VSEARCH 2.17.1

Modernized code. Minor update to help info.