PI: Remove b_ call in FloatObject.write_to_stream

[MartinThoma]

No description provided.

[martin-thoma]

I had one particularly nasty PDF document where compression was pretty time-consuming:

from PyPDF2 import PdfReader, PdfWriter

reader = PdfReader("example.pdf")
writer = PdfWriter()

for page in reader.pages:
    page.compress_content_streams()
    writer.add_page(page)

with open("out.pdf", "wb") as fp:
    writer.write(fp)

Before FloatObject.write_to_stream had 1.3 Million calls to b_:

After:

Graphs created via:

python -m cProfile -o profile.pstats example.py
gprof2dot -f pstats profile.pstats | dot -Tsvg -o mine.svg

[codecov]

Codecov Report

Merging #1044 (574b334) into main (84c3e33) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1044   +/-   ##
=======================================
  Coverage   89.93%   89.93%           
=======================================
  Files          24       24           
  Lines        4479     4479           
  Branches      916      916           
=======================================
  Hits         4028     4028           
  Misses        308      308           
  Partials      143      143           

Impacted Files	Coverage Δ
PyPDF2/_writer.py	88.83% <100.00%> (ø)
PyPDF2/generic.py	91.34% <100.00%> (ø)

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