What is the best way to index a vcf file? in the style of Chaucer

Of indexing VCF, a noble feat I tell,
To enhance the query, access it well.
In verity, three methods of renown,
I shall present, as erstwhile made known.

First, Tabix, a tool oft sung, 'tis true,
An index file (.tbi) it doth imbue.
With swiftness, variants it doth retrieve,
By genomic coordinates, it doth achieve.
Through binning scheme, vast files it doth face,
Thus suited for grand VCF's ample space.
To craft Tabix index, with HTSlib's might,
Employ "tabix" command-line, aright.

Next, CSI, a scheme by scholars hailed,
Ingenious indexing, where it hath prevailed.
Borne of B+ tree, its structure fine,
Bestows quick access to variants, thine.
"bcftools" command-line, HTSlib's own,
Shall forge the CSI index, rightly known.
Upon VCF files, it shall take hold,
With random access, its virtue bold.

Lastly, GEMINI, a tool bespoke,
Genetic variant data, it doth invoke.
An SQLite database, where indexing lies,
Flexible queries, filtering it supplies.
Large VCF files, it doth gladly receive,
With annotations, interpretation to achieve.
GEMINI's might, beyond indexing reams,
Shall serve those seeking more variant dreams.

Choose wisely, dear reader, to thy need,
These methods bespoke, each doth proceed.
Tabix and CSI, favored and well-known,
Supported widely, in tools they are shown.
But if annotations, interpretations be dear,
GEMINI's bounty may bring you cheer.
Thus, select the method, that suits thee best,
In the realm of VCF indexing, be blessed.