BLD: strict alias warning in float hashtable

[chris-b1]

xref #17936

[chris-b1]

Just as a sanity check, the new does optimize out identically
https://godbolt.org/g/qAtgXS

[jreback]

cool. i would run some asv just to check (should be the same)

[codecov]

Codecov Report

Merging #18025 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #18025      +/-   ##
==========================================
- Coverage   91.26%   91.24%   -0.02%     
==========================================
  Files         163      163              
  Lines       50099    50099              
==========================================
- Hits        45724    45715       -9     
- Misses       4375     4384       +9

Flag	Coverage Δ
#multiple	89.05% <ø> (ø)	⬆️
#single	40.24% <ø> (-0.06%)	⬇️

Impacted Files	Coverage Δ
pandas/io/gbq.py	25% <0%> (-58.34%)	⬇️
pandas/core/frame.py	97.75% <0%> (-0.1%)	⬇️

---

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[codecov]

Codecov Report

Merging #18025 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #18025      +/-   ##
==========================================
- Coverage   91.26%   91.24%   -0.02%     
==========================================
  Files         163      163              
  Lines       50099    50099              
==========================================
- Hits        45724    45715       -9     
- Misses       4375     4384       +9

Flag	Coverage Δ
#multiple	89.05% <ø> (ø)	⬆️
#single	40.24% <ø> (-0.06%)	⬇️

Impacted Files	Coverage Δ
pandas/io/gbq.py	25% <0%> (-58.34%)	⬇️
pandas/core/frame.py	97.75% <0%> (-0.1%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov]

Codecov Report

Merging #18025 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #18025      +/-   ##
==========================================
- Coverage   91.26%   91.24%   -0.02%     
==========================================
  Files         163      163              
  Lines       50099    50099              
==========================================
- Hits        45724    45715       -9     
- Misses       4375     4384       +9

Flag	Coverage Δ
#multiple	89.05% <ø> (ø)	⬆️
#single	40.24% <ø> (-0.06%)	⬇️

Impacted Files	Coverage Δ
pandas/io/gbq.py	25% <0%> (-58.34%)	⬇️
pandas/core/frame.py	97.75% <0%> (-0.1%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a355ed2...61f2944. Read the comment docs.

[jreback]

thanks @chris-b1 !