# BigFloat, 1.5x..2x faster

**URL:** <https://discourse.julialang.org/t/bigfloat-1-5x-2x-faster/8619>\
**Category:** Internals & Design\
**Created:** [January 26, 2018, 5:11pm UTC](https://discourse.julialang.org/t/bigfloat-1-5x-2x-faster/8619 "2018-01-26T17:11:13Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![JeffreySarnoff](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jeffreysarnoff/32/1980_2.png) [@JeffreySarnoff](https://discourse.julialang.org/u/JeffreySarnoff)\
**Post date:** [January 26, 2018, 5:11pm UTC](https://discourse.julialang.org/t/bigfloat-1-5x-2x-faster/8619/1 "2018-01-26T17:11:13Z")

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Use MPFR version 4: [Lefèvre and Zimmermann](https://hal.inria.fr/hal-01502326/document)

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**Author:** ![simonbyrne](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/simonbyrne/32/19_2.png) [@simonbyrne](https://discourse.julialang.org/u/simonbyrne)\
**Post date:** [January 26, 2018, 6:37pm UTC](https://discourse.julialang.org/t/bigfloat-1-5x-2x-faster/8619/2 "2018-01-26T18:37:27Z")

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It just landed in master: [https://github.com/JuliaLang/julia/pull/25710](https://github.com/JuliaLang/julia/pull/25710)

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**Author:** ![JeffreySarnoff](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jeffreysarnoff/32/1980_2.png) [@JeffreySarnoff](https://discourse.julialang.org/u/JeffreySarnoff)\
**Post date:** [January 26, 2018, 8:29pm UTC](https://discourse.julialang.org/t/bigfloat-1-5x-2x-faster/8619/3 "2018-01-26T20:29:17Z")

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wow … _I do not impress easily_ … that is impressive

the best definition of `JuliaTime`

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<div class="post-metadata">

**Author:** ![JeffreySarnoff](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jeffreysarnoff/32/1980_2.png) [@JeffreySarnoff](https://discourse.julialang.org/u/JeffreySarnoff)\
**Post date:** [January 27, 2018, 3:38am UTC](https://discourse.julialang.org/t/bigfloat-1-5x-2x-faster/8619/4 "2018-01-27T03:38:16Z")

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I am not seeing a performance gain with small or medium precisions.