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Disable LTO builds in tests (and bump deps to -O2) #1497

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Merged
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Mar 4, 2023
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Disable LTO builds in tests (and bump deps to -O2) #1497

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16 changes: 11 additions & 5 deletions Cargo.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -16,14 +16,20 @@ exclude = [
"no-std-check",
]

# Our tests do actual crypto and lots of work, the tradeoff for -O1 is well worth it.
# Ideally we would only do this in profile.test, but profile.test only applies to
# the test binary, not dependencies, which means most of the critical code still
# gets compiled as -O0. See
# Our tests do actual crypto and lots of work, the tradeoff for -O2 is well
# worth it. Note that we only apply optimizations to dependencies, not workspace
# crates themselves.
# https://doc.rust-lang.org/cargo/reference/profiles.html#profile-selection
[profile.dev.package."*"]
opt-level = 2

# It appears some minimal optimizations are required to inline many std methods
# and reduce the otherwise-substantial time spent in std self-checks. We do so
# here but ensure we keep LTO disabled as otherwise we're re-optimizing all our
# dependencies every time we make any local changes.
[profile.dev]
opt-level = 1
panic = "abort"
lto = "off"

[profile.release]
opt-level = 3
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