YOU SAID:

The search to perform once the data is read in would be greatly aided by organizing this by 'sequence' (instead of by 'accession'), but that would make it very hard to work with. I presume that this may end up being used for more, and that a small loss of speed is not of consequence. If the sole objective here were to answer the specific question with optimal performance other approaches would be more suitable. Comments follow the code.

INTO JAPANESE

データが読み込まれた後に実行する検索は、これを（ 'accession'ではなく） 'sequence'で整理することで非常に役立ちますが、その場合は作業が非常に困難になります。私はこれがもっと使われることになるかもしれないと思います、そして少しの速度の損失は重要ではありません。ここでの唯一の目的が特定の質問に答えることだった場合

BACK INTO ENGLISH

A search performed after the data has been read can be very useful by organizing it by 'sequence' (instead of 'accession'), but doing so can be very difficult. I think this may be used more, and a little speed loss is important

INTO JAPANESE

データが読み取られた後に実行される検索は、（ 'accession'ではなく） 'sequence'で編成することで非常に役立ちますが、そうすることは非常に困難になる可能性があります。私はこれがもっと使われるかもしれないと思います、そして少し速度の損失は重要です

BACK INTO ENGLISH

The search performed after the data is read can be very useful to be organized by 'sequence' (rather than 'accession'), but doing so can be very difficult. I think this may be used more, and a little speed loss is important

INTO JAPANESE

データが読み取られた後に実行される検索は、（ 'accession'ではなく） 'sequence'で整理するのに非常に役立ちますが、そうすることは非常に難しい場合があります。私はこれがもっと使われるかもしれないと思います、そして少し速度の損失は重要です

BACK INTO ENGLISH

The search performed after the data is read can be very useful for organizing with 'sequence' (not 'accession'), but doing so can be very difficult. I think this may be used more, and a little speed loss is important

INTO JAPANESE

データが読み取られた後に実行される検索は、（ 'accession'ではなく） 'sequence'で整理するのに非常に役立ちますが、そうすることは非常に難しい場合があります。私はこれがもっと使われるかもしれないと思います、そして少し速度の損失は重要です

BACK INTO ENGLISH

The search performed after the data is read can be very useful for organizing with 'sequence' (not 'accession'), but doing so can be very difficult. I think this may be used more, and a little speed loss is important